http://www.jendo.org/wiki1231/index.php?action=history&feed=atom&title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88
響應式網站設計 - 修訂歷史
2026-04-10T04:51:07Z
本 Wiki 上此頁面的修訂歷史
MediaWiki 1.35.14
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38180&oldid=prev
丁志仁：/* rem */
2018-01-23T13:57:57Z
<p><span dir="auto"><span class="autocomment">rem</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
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<col class="diff-content" />
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:57 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l88" >第88行：</td>
<td colspan="2" class="diff-lineno">第88行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td>rem</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td>rem</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td>4 (532.3)</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td>4 (532.3)</td></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <td><del class="diffchange diffchange-inline"><a href="</del>/en-US/Firefox/Releases/3.6<del class="diffchange diffchange-inline">" title="Released on 2010-01-21."></del>3.6<del class="diffchange diffchange-inline"></a> </del>(1.9.2)</td></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <td><ins class="diffchange diffchange-inline">[http:/</ins>/en-US/Firefox/Releases/3.6 3.6<ins class="diffchange diffchange-inline">] </ins>(1.9.2)</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td>9.0</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td>9.0</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td>11.6</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td>11.6</td></div></td></tr>
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丁志仁
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38179&oldid=prev
丁志仁：/* rem */
2018-01-23T13:55:42Z
<p><span dir="auto"><span class="autocomment">rem</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="zh-Hant-TW">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:55 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l73" >第73行：</td>
<td colspan="2" class="diff-lineno">第73行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD <del class="diffchange diffchange-inline">響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD <ins class="diffchange diffchange-inline">響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。rem 中的 r 是 root 的意思。</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">不是每個瀏覽器都有支援 rem ，以下是各瀏覽器支援 rem 的最低版本：</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"><table class=nicetable></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <tr></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <th>性質</th></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <th>Chrome</th></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <th>Firefox (Gecko)</th></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <th>Internet Explorer</th></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <th>Opera</th></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <th>Safari</th></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> </tr></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <tr></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <td>rem</td></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <td>4 (532.3)</td></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <td><a href="/en-US/Firefox/Releases/3.6" title="Released on 2010-01-21.">3.6</a> (1.9.2)</td></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <td>9.0</td></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <td>11.6</td></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <td>4.1</td></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> </tr></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> </table></ins></div></td></tr>
</table>
丁志仁
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38178&oldid=prev
丁志仁：/* em */
2018-01-23T13:46:54Z
<p><span dir="auto"><span class="autocomment">em</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="zh-Hant-TW">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:46 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l53" >第53行：</td>
<td colspan="2" class="diff-lineno">第53行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:3px;font-size:10px;float:right;clear:right;'><del class="diffchange diffchange-inline">font</del>-size: 10px</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:3px;font-size:10px;float:right;clear:right;'><ins class="diffchange diffchange-inline">例一：font</ins>-size: 10px</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:3px;padding:3px;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:3px;padding:3px;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:3px;padding:3px;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:3px;padding:3px;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l60" >第60行：</td>
<td colspan="2" class="diff-lineno">第60行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>從右方的範例可以發現，如果外圍是以 10px，內層的文字第一層 1em 等同於 10px，隨後的依比例放大。</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>從右方的範例可以發現，如果外圍是以 10px，內層的文字第一層 1em 等同於 10px，隨後的依比例放大。<ins class="diffchange diffchange-inline"><br/><br/><br/></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:3px;font-size:10px;float:right;clear:right;'><del class="diffchange diffchange-inline">font</del>-size: 10px</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:3px;font-size:10px;float:right;clear:right;'><ins class="diffchange diffchange-inline">例二：font</ins>-size: 10px</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:3px;padding:3px;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:3px;padding:3px;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:3px;padding:3px;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:3px;padding:3px;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
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丁志仁
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38177&oldid=prev
丁志仁：/* em */
2018-01-23T13:44:43Z
<p><span dir="auto"><span class="autocomment">em</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:44 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l53" >第53行：</td>
<td colspan="2" class="diff-lineno">第53行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:<del class="diffchange diffchange-inline">15px</del>;float:right;clear:right;'>font-size: <del class="diffchange diffchange-inline">15px</del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:<ins class="diffchange diffchange-inline">10px</ins>;float:right;clear:right;'>font-size: <ins class="diffchange diffchange-inline">10px</ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<del class="diffchange diffchange-inline">5px</del>;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<ins class="diffchange diffchange-inline">3px</ins>;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<del class="diffchange diffchange-inline">5px</del>;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<ins class="diffchange diffchange-inline">3px</ins>;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<del class="diffchange diffchange-inline">5px</del>;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:1.4em;'>font-size: 1.4em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<ins class="diffchange diffchange-inline">3px</ins>;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:1.4em;'>font-size: 1.4em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>從右方的範例可以發現，如果外圍是以 <del class="diffchange diffchange-inline">15px，內層的文字第一層 </del>1em 等同於 <del class="diffchange diffchange-inline">15px，隨後的依比例放大。</del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>從右方的範例可以發現，如果外圍是以 <ins class="diffchange diffchange-inline">10px，內層的文字第一層 </ins>1em 等同於 <ins class="diffchange diffchange-inline">10px，隨後的依比例放大。</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:<del class="diffchange diffchange-inline">15px</del>;float:right;clear:right;'>font-size: <del class="diffchange diffchange-inline">15px</del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:<ins class="diffchange diffchange-inline">10px</ins>;float:right;clear:right;'>font-size: <ins class="diffchange diffchange-inline">10px</ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<del class="diffchange diffchange-inline">5px</del>;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<ins class="diffchange diffchange-inline">3px</ins>;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<del class="diffchange diffchange-inline">5px</del>;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<ins class="diffchange diffchange-inline">3px</ins>;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<del class="diffchange diffchange-inline">5px</del>;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:1.4em;'>font-size: 1.4em</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<ins class="diffchange diffchange-inline">3px</ins>;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:1.4em;'>font-size: 1.4em</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<del class="diffchange diffchange-inline">5px</del>;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<ins class="diffchange diffchange-inline">3px</ins>;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<del class="diffchange diffchange-inline">5px</del>;padding:<del class="diffchange diffchange-inline">5px</del>;font-size:1.4em;'>font-size: 1.4em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:<ins class="diffchange diffchange-inline">3px</ins>;padding:<ins class="diffchange diffchange-inline">3px</ins>;font-size:1.4em;'>font-size: 1.4em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>接下來觀察 em 的疊加效應：外層的文字大小從 <del class="diffchange diffchange-inline">15px </del>開始，可以看到內層的 1em 文字大小等同於外層的 <del class="diffchange diffchange-inline">15px </del>，隨後的逐漸放大。如果再加入一層在內部，文字就會以 1.4×1.4 的倍數再放大，這是 em 的相對比例單位的特性，是優點也是缺點，如果無法掌握就容易失控。</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>接下來觀察 em 的疊加效應：外層的文字大小從 <ins class="diffchange diffchange-inline">10px </ins>開始，可以看到內層的 1em 文字大小等同於外層的 <ins class="diffchange diffchange-inline">10px </ins>，隨後的逐漸放大。如果再加入一層在內部，文字就會以 1.4×1.4 的倍數再放大，這是 em 的相對比例單位的特性，是優點也是缺點，如果無法掌握就容易失控。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td></tr>
<!-- diff cache key wiki1231:diff::1.12:old-38176:rev-38177 -->
</table>
丁志仁
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38176&oldid=prev
丁志仁：/* em */
2018-01-23T13:40:35Z
<p><span dir="auto"><span class="autocomment">em</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="zh-Hant-TW">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:40 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l53" >第53行：</td>
<td colspan="2" class="diff-lineno">第53行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:5px;font-size:15px;float:right;'>font-size: 15px</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:5px;font-size:15px;float<ins class="diffchange diffchange-inline">:right;clear</ins>:right;'>font-size: 15px</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;padding:5px;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;padding:5px;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;padding:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;padding:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l62" >第62行：</td>
<td colspan="2" class="diff-lineno">第62行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>從右方的範例可以發現，如果外圍是以 15px，內層的文字第一層 1em 等同於 15px，隨後的依比例放大。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>從右方的範例可以發現，如果外圍是以 15px，內層的文字第一層 1em 等同於 15px，隨後的依比例放大。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:5px;font-size:15px;float:right;'>font-size: 15px</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:5px;font-size:15px;float<ins class="diffchange diffchange-inline">:right;clear</ins>:right;'>font-size: 15px</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">marging</del>:5px;padding:5px;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">margin</ins>:5px;padding:5px;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">marging</del>:5px;padding:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">margin</ins>:5px;padding:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">marging</del>:5px;padding:5px;font-size:1.4em;'>font-size: 1.4em</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">margin</ins>:5px;padding:5px;font-size:1.4em;'>font-size: 1.4em</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">marging</del>:5px;padding:5px;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">margin</ins>:5px;padding:5px;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">marging</del>:5px;padding:5px;font-size:1.4em;'>font-size: 1.4em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">margin</ins>:5px;padding:5px;font-size:1.4em;'>font-size: 1.4em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td></tr>
</table>
丁志仁
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38175&oldid=prev
丁志仁：/* em */
2018-01-23T13:36:56Z
<p><span dir="auto"><span class="autocomment">em</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="zh-Hant-TW">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:36 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l53" >第53行：</td>
<td colspan="2" class="diff-lineno">第53行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em <del class="diffchange diffchange-inline">會受到外圍的文字大小所影響，</del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"><div style='border:#888 solid 1px;width:33%;padding:5px;font-size:15px;float:right;'>font-size: 15px</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <div style='border:#888 solid 1px;margin:5px;padding:5px;font-size:1em;'>font-size: 1em</div></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <div style='border:#888 solid 1px;margin:5px;padding:5px;font-size:1.2em;'>font-size: 1.2em</div></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <div style='border:#888 solid 1px;margin:5px;padding:5px;font-size:1.4em;'>font-size: 1.4em</div></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"></div></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em <ins class="diffchange diffchange-inline">會受到外圍的文字大小所影響。</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">從右方的範例可以發現，如果外圍是以 15px，內層的文字第一層 1em 等同於 15px，隨後的依比例放大。</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:5px;font-size:15px;float:right;'>font-size: 15px</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;padding:5px;font-size:15px;float:right;'>font-size: 15px</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">margin</del>:5px;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">marging:5px;padding</ins>:5px;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">margin</del>:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">marging:5px;padding</ins>:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">margin</del>:5px;font-size:1.4em;'>font-size: 1.4em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">marging:5px;padding</ins>:5px;font-size:1.4em;'>font-size: 1.4em</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <div style='border:#888 solid 1px;marging:5px;padding:5px;font-size:1em;'>font-size: 1em</div></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <div style='border:#888 solid 1px;marging:5px;padding:5px;font-size:1.4em;'>font-size: 1.4em</div></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> </ins></div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">以右方的範例可以發現，如果外圍是以 15px，內層的文字第一層 </del>1em <del class="diffchange diffchange-inline">等同於 15px，隨後的依比例放大。</del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">接下來觀察 em 的疊加效應：外層的文字大小從 15px 開始，可以看到內層的 </ins>1em <ins class="diffchange diffchange-inline">文字大小等同於外層的 15px ，隨後的逐漸放大。如果再加入一層在內部，文字就會以 1.4×1.4 的倍數再放大，這是 em 的相對比例單位的特性，是優點也是缺點，如果無法掌握就容易失控。</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td></tr>
<!-- diff cache key wiki1231:diff::1.12:old-38174:rev-38175 -->
</table>
丁志仁
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38174&oldid=prev
丁志仁：/* em */
2018-01-23T13:21:37Z
<p><span dir="auto"><span class="autocomment">em</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="zh-Hant-TW">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:21 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l55" >第55行：</td>
<td colspan="2" class="diff-lineno">第55行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響，</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響，</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%;'>font-size: 15px</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;width:33%<ins class="diffchange diffchange-inline">;padding:5px;font-size:15px;float:right</ins>;'>font-size: 15px</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;font-size:1.4em;'>font-size: 1.4em</div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;margin:5px;font-size:1.4em;'>font-size: 1.4em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">以右方的範例可以發現，如果外圍是以 15px，內層的文字第一層 1em 等同於 15px，隨後的依比例放大。</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td></tr>
</table>
丁志仁
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38173&oldid=prev
丁志仁：/* em */
2018-01-23T13:17:08Z
<p><span dir="auto"><span class="autocomment">em</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="zh-Hant-TW">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:17 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l55" >第55行：</td>
<td colspan="2" class="diff-lineno">第55行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響，</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響，</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px;'>font-size: 15px</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid 1px<ins class="diffchange diffchange-inline">;width:33%</ins>;'>font-size: 15px</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">marging</del>:5px;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">margin</ins>:5px;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">marging</del>:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">margin</ins>:5px;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<del class="diffchange diffchange-inline">marging</del>:5px;font-size:1.4em;'>font-size: 1.4em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid 1px;<ins class="diffchange diffchange-inline">margin</ins>:5px;font-size:1.4em;'>font-size: 1.4em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td></tr>
</table>
丁志仁
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38172&oldid=prev
丁志仁：/* em */
2018-01-23T13:15:04Z
<p><span dir="auto"><span class="autocomment">em</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="zh-Hant-TW">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:15 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l55" >第55行：</td>
<td colspan="2" class="diff-lineno">第55行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響，</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在 CSS 中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響，</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid;'>font-size: 15px</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><div style='border:#888 solid <ins class="diffchange diffchange-inline">1px</ins>;'>font-size: 15px</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid;font-size:1em;'>font-size: 1em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid <ins class="diffchange diffchange-inline">1px;marging:5px</ins>;font-size:1em;'>font-size: 1em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid;font-size:1.2em;'>font-size: 1.2em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid <ins class="diffchange diffchange-inline">1px;marging:5px</ins>;font-size:1.2em;'>font-size: 1.2em</div></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid;font-size:1.4em;'>font-size: 1.4em</div></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <div style='border:#888 solid <ins class="diffchange diffchange-inline">1px;marging:5px</ins>;font-size:1.4em;'>font-size: 1.4em</div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td></tr>
</table>
丁志仁
http://www.jendo.org/wiki1231/index.php?title=%E9%9F%BF%E6%87%89%E5%BC%8F%E7%B6%B2%E7%AB%99%E8%A8%AD%E8%A8%88&diff=38171&oldid=prev
丁志仁：/* em */
2018-01-23T13:11:48Z
<p><span dir="auto"><span class="autocomment">em</span></span></p>
<table class="diff diff-contentalign-left diff-editfont-monospace" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="zh-Hant-TW">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上個修訂</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">於 2018年1月23日 (二) 13:11 的修訂</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l53" >第53行：</td>
<td colspan="2" class="diff-lineno">第53行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>在活版印刷中，大多數字體的字母大寫 M 常常最接近每個字母的寬度，所以被用來代表點陣字的字寬。金屬字模的大小不能超過 em 。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>在 CSS <del class="diffchange diffchange-inline">中，</del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>在 CSS <ins class="diffchange diffchange-inline">中，em 代表目前元素的 font-size ，1em 即是 1 個的文字大小， 1.5em 也就是 1.5 倍的文字大小。em 會受到外圍的文字大小所影響，</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"><div style='border:#888 solid;'>font-size: 15px</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <div style='border:#888 solid;font-size:1em;'>font-size: 1em</div></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <div style='border:#888 solid;font-size:1.2em;'>font-size: 1.2em</div></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"> <div style='border:#888 solid;font-size:1.4em;'>font-size: 1.4em</div></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"></div></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===rem===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>rem，則是CSS3新推出來解決em疊加問題的字級單位。其文字基準取決於最外層的 html 文字大小，很適合用在整體的尺寸大小切換，以 RWD 響應式網頁來說，可以依據不同的尺寸，統一切換整體網頁的文字大小。</div></td></tr>
<!-- diff cache key wiki1231:diff::1.12:old-38170:rev-38171 -->
</table>
丁志仁