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Do you really understand HTML? _html/css_WEB-ITnose
Jun 24, 2016 am 11:58 AM
html
Many websites set {margin:0; padding:0;} for divs, right? Demo click here - -
心里懷著這樣的疑問(wèn)，抱著試一試的態(tài)度，我們?nèi)タ纯闯Ｓ玫臉?biāo)簽?zāi)切┯心J(rèn)的margin/padding？
FF 32.0:
==== Margin ==== h1,21.4333px,0px,21.4333px,0pxh2,19.9167px,0px,19.9167px,0pxh3,18.7167px,0px,18.7167px,0pxh4,21.2833px,0px,21.2833px,0pxh5,22.1833px,0px,22.1833px,0pxh6,24.9667px,0px,24.9667px,0pxp,16px,0px,16px,0pxul,16px,0px,16px,0pxol,16px,0px,16px,0pxdl,16px,0px,16px,0pxdd,0px,0px,0px,40pxhr,8px,0px,8px,0pxpre,16px,0px,16px,0pxfigure,16px,40px,16px,40pxfieldset,0px,2px,0px,2pxblockquote,16px,40px,16px,40pxtextarea,1px,0px,1px,0pxtextarea,1px,0px,1px,0px==== Padding ====ul,0px,0px,0px,40pxol,0px,0px,0px,40pxth,1px,1px,1px,1pxtd,1px,1px,1px,1pxtd,1px,1px,1px,1pxfieldset,5.6px,10px,12px,10pxlegend,0px,2px,0px,2pxinput,2px,2px,2px,2pxselect,1px,1px,1px,1pxoption,0px,5px,0px,3pxoption,0px,5px,0px,3pxtextarea,2px,2px,2px,2pxbutton,0px,6px,0px,6pxselect,1px,1px,1px,1pxoption,0px,0px,0px,20pxoption,0px,0px,0px,20pxtextarea,2px,2px,2px,2px
Chrome 36.0:
==== Margin ==== h1,21.440000534057617px,0px,21.440000534057617px,0pxh2,19.920000076293945px,0px,19.920000076293945px,0pxh3,18.719999313354492px,0px,18.719999313354492px,0pxh4,21.280000686645508px,0px,21.280000686645508px,0pxh5,22.17759895324707px,0px,22.17759895324707px,0pxh6,27.959999084472656px,0px,27.959999084472656px,0pxp,16px,0px,16px,0pxul,16px,0px,16px,0pxol,16px,0px,16px,0pxdl,16px,0px,16px,0pxdd,0px,0px,0px,40pxhr,8px,0px,8px,0pxpre,13px,0px,13px,0pxfigure,16px,40px,16px,40pxfieldset,0px,2px,0px,2pxblockquote,16px,40px,16px,40pxinput,2px,2px,2px,2pxkeygen,2px,2px,2px,2pxtextarea,2px,2px,2px,2pxbutton,2px,2px,2px,2pxselect,2px,2px,2px,2pxtextarea,2px,0px,2px,0px==== Padding ====ul,0px,0px,0px,40pxol,0px,0px,0px,40pxth,1px,1px,1px,1pxtd,1px,1px,1px,1pxtd,1px,1px,1px,1pxfieldset,5.599999904632568px,12px,10px,12pxlegend,0px,2px,0px,2pxinput,1px,0px,1px,0pxtextarea,2px,2px,2px,2pxbutton,1px,6px,1px,6pxtextarea,2px,2px,2px,2px
IE 10:
==== Margin ==== h1,21.44px,0px,21.44px,0pxh2,19.92px,0px,19.92px,0pxh3,18.73px,0px,18.73px,0pxh4,21.28px,0px,21.28px,0pxh5,22.15px,0px,22.15px,0pxh6,25px,0px,25px,0pxp,16px,0px,16px,0pxul,16px,0px,16px,0pxol,16px,0px,16px,0pxdl,16px,0px,16px,0pxdd,0px,0px,0px,40pxhr,8px,0px,8px,0pxpre,13.33px,0px,13.33px,0pxfigure,16px,40px,16px,40pxfieldset,0px,2px,0px,2pxblockquote,16px,40px,16px,40px==== Padding ====ul,0px,0px,0px,40pxol,0px,0px,0px,40pxth,1px,1px,1px,1pxtd,1px,1px,1px,1pxtd,1px,1px,1px,1pxfieldset,2px,2px,3px,2pxlegend,0px,2px,0px,2pxinput,2px,1px,2px,1pxtextarea,2px,2px,2px,2pxbutton,3px,10px,3px,10pxtextarea,2px,2px,2px,2px
IE 9:
==== Margin ==== h1,21.44px,0px,21.44px,0pxh2,19.92px,0px,19.92px,0pxh3,18.73px,0px,18.73px,0pxh4,21.28px,0px,21.28px,0pxh5,22.15px,0px,22.15px,0pxh6,25px,0px,25px,0pxp,16px,0px,16px,0pxul,16px,0px,16px,0pxol,16px,0px,16px,0pxdl,16px,0px,16px,0pxdd,0px,0px,0px,40pxhr,8px,0px,8px,0pxpre,13.33px,0px,13.33px,0pxfigure,16px,40px,16px,40pxfieldset,0px,2px,0px,2pxblockquote,16px,40px,16px,40px==== Padding ====ul,0px,0px,0px,40pxol,0px,0px,0px,40pxth,1px,1px,1px,1pxtd,1px,1px,1px,1pxtd,1px,1px,1px,1pxfieldset,2px,2px,3px,2pxlegend,0px,2px,0px,2pxinput,2px,1px,2px,1pxtextarea,2px,2px,2px,2pxbutton,3px,10px,3px,10pxtextarea,2px,2px,2px,2px
IE 8:
==== Margin ==== h3,1em,0em,1em,0em h4,1.33em,0em,1.33em,0em h5,1.67em,0em,1.67em,0em h6,2.33em,0em,2.33em,0em p,1em,0px,1em,0px ul,1em,0px,1em,0px ol,1em,0px,1em,0px dl,1em,0px,1em,0px dd,auto,auto,auto,40px hr,0.5em,auto,0.5em,auto pre,1em,0px,1em,0px fieldset,0px,2px,0px,2px blockquote,1em,40px,1em,40px ==== Padding ==== ul,0px,0px,0px,30pt ol,0px,0px,0px,30pt th,1px,1px,1px,1px td,1px,1px,1px,1px td,1px,1px,1px,1px fieldset,0px,2px,3px,2px legend,0px,2px,0px,2px input,2px,1px,2px,1px textarea,2px,2px,2px,2px button,3px,10px,3px,10px textarea,2px,2px,2px,2px
IE 7:
==== Margin ==== ul,auto,auto,auto,30pt ol,auto,auto,auto,30pt dd,auto,auto,auto,30pt blockquote,auto,30pt,auto,30pt ==== Padding ==== caption,1px,300zzz,500zzz,300zzz th,1px,1px,1px,1px td,1px,1px,1px,1px td,1px,1px,1px,1px fieldset,0px,2px,3px,2px legend,0px,2px,0px,2px input,2px,1px,2px,1px textarea,2px,2px,2px,2px button,1px,0.5px,1px,0.5px textarea,2px,2px,2px,2px
IE 6:
==== Margin ==== ul,auto,auto,auto,30pt ol,auto,auto,auto,30pt dd,auto,auto,auto,30pt blockquote,auto,30pt,auto,30pt ==== Padding ==== caption,1px,3px,5px,3px th,1px,1px,1px,1px td,1px,1px,1px,1px td,1px,1px,1px,1px fieldset,0px,2px,3px,2px legend,0px,2px,0px,2px input,1px,1px,1px,1px textarea,2px,2px,2px,2px textarea,2px,2px,2px,2px
Sogou:
==== Margin ==== h1,21.440000534057617px,0px,21.440000534057617px,0pxh2,19.920000076293945px,0px,19.920000076293945px,0pxh3,18.719999313354492px,0px,18.719999313354492px,0pxh4,21.280000686645508px,0px,21.280000686645508px,0pxh5,22.17759895324707px,0px,22.17759895324707px,0pxh6,27.959999084472656px,0px,27.959999084472656px,0pxp,16px,0px,16px,0pxul,16px,0px,16px,0pxol,16px,0px,16px,0pxdl,16px,0px,16px,0pxdd,0px,0px,0px,40pxhr,8px,0px,8px,0pxpre,13px,0px,13px,0pxfigure,16px,40px,16px,40pxfieldset,0px,2px,0px,2pxblockquote,16px,40px,16px,40pxinput,2px,2px,2px,2pxkeygen,2px,2px,2px,2pxtextarea,2px,2px,2px,2pxbutton,2px,2px,2px,2pxselect,2px,2px,2px,2pxtextarea,2px,0px,2px,0px==== Padding ====ul,0px,0px,0px,40pxol,0px,0px,0px,40pxth,1px,1px,1px,1pxtd,1px,1px,1px,1pxtd,1px,1px,1px,1pxfieldset,5.599999904632568px,12px,10px,12pxlegend,0px,2px,0px,2pxinput,1px,0px,1px,0pxtextarea,2px,2px,2px,2pxbutton,1px,6px,1px,6pxtextarea,2px,2px,2px,2px
360 Security:
==== Margin ==== h1,21.440000534057617px,0px,21.440000534057617px,0pxh2,19.920000076293945px,0px,19.920000076293945px,0pxh3,18.719999313354492px,0px,18.719999313354492px,0pxh4,21.280000686645508px,0px,21.280000686645508px,0pxh5,22.17759895324707px,0px,22.17759895324707px,0pxh6,27.959999084472656px,0px,27.959999084472656px,0pxp,16px,0px,16px,0pxul,16px,0px,16px,0pxol,16px,0px,16px,0pxdl,16px,0px,16px,0pxdd,0px,0px,0px,40pxhr,8px,0px,8px,0pxpre,13px,0px,13px,0pxfigure,16px,40px,16px,40pxfieldset,0px,2px,0px,2pxblockquote,16px,40px,16px,40pxinput,2px,2px,2px,2pxkeygen,2px,2px,2px,2pxtextarea,2px,2px,2px,2pxbutton,2px,2px,2px,2pxselect,2px,2px,2px,2pxtextarea,2px,0px,2px,0px==== Padding ====ul,0px,0px,0px,40pxol,0px,0px,0px,40pxth,1px,1px,1px,1pxtd,1px,1px,1px,1pxtd,1px,1px,1px,1pxfieldset,5.599999904632568px,12px,10px,12pxlegend,0px,2px,0px,2pxinput,1px,0px,1px,0pxtextarea,2px,2px,2px,2pxbutton,1px,6px,1px,6pxtextarea,2px,2px,2px,2px
Opera 24.0:
==== Margin ==== h1,21.4400005340576px,0px,21.4400005340576px,0pxh2,19.9200000762939px,0px,19.9200000762939px,0pxh3,18.7199993133545px,0px,18.7199993133545px,0pxh4,21.2800006866455px,0px,21.2800006866455px,0pxh5,22.1775989532471px,0px,22.1775989532471px,0pxh6,27.9599990844727px,0px,27.9599990844727px,0pxp,16px,0px,16px,0pxul,16px,0px,16px,0pxol,16px,0px,16px,0pxdl,16px,0px,16px,0pxdd,0px,0px,0px,40pxhr,8px,0px,8px,0pxpre,13px,0px,13px,0pxfigure,16px,40px,16px,40pxfieldset,0px,2px,0px,2pxblockquote,16px,40px,16px,40pxinput,2px,2px,2px,2pxkeygen,2px,2px,2px,2pxtextarea,2px,2px,2px,2pxbutton,2px,2px,2px,2pxselect,2px,2px,2px,2pxtextarea,2px,0px,2px,0px==== Padding ====ul,0px,0px,0px,40pxol,0px,0px,0px,40pxth,1px,1px,1px,1pxtd,1px,1px,1px,1pxtd,1px,1px,1px,1pxfieldset,5.59999990463257px,12px,10px,12pxlegend,0px,2px,0px,2pxinput,1px,0px,1px,0pxtextarea,2px,2px,2px,2pxbutton,1px,6px,1px,6pxtextarea,2px,2px,2px,2px
Safari 5.17:
==== Margin ==== h1,21px,0px,21px,0pxh2,19px,0px,19px,0pxh3,18px,0px,18px,0pxh4,21px,0px,21px,0pxh5,22px,0px,22px,0pxh6,24px,0px,24px,0pxp,16px,0px,16px,0pxul,16px,0px,16px,0pxol,16px,0px,16px,0pxdl,16px,0px,16px,0pxdd,0px,0px,0px,40pxhr,8px,0px,8px,0pxpre,13px,0px,13px,0pxfigure,16px,40px,16px,40pxfieldset,0px,2px,0px,2pxblockquote,16px,40px,16px,40pxinput,2px,2px,2px,2pxkeygen,2px,2px,2px,2pxtextarea,2px,2px,2px,2pxbutton,2px,2px,2px,2pxselect,2px,2px,2px,2pxtextarea,2px,0px,2px,0px==== Padding ====ul,0px,0px,0px,40pxol,0px,0px,0px,40pxth,1px,1px,1px,1pxtd,1px,1px,1px,1pxtd,1px,1px,1px,1pxfieldset,5px,12px,10px,12pxlegend,0px,2px,0px,2pxinput,1px,0px,1px,0pxtextarea,2px,2px,2px,2pxbutton,1px,6px,1px,6pxselect,2px,21px,2px,4pxtextarea,2px,2px,2px,2px
Common block elements and features:
<!-- 塊元素：獨(dú)占一行，寬(100%)、高、行高、padding、margin可控 --><h1>h1</h1><h2>h2</h2><h3>h3</h3><h4>h4</h4><h5>h5</h5><h6>h6</h6><p>p</p><ul> <li>無(wú)序列表</li></ul><ol> <li>有序列表</li></ol><dl> <dt>自定義列表項(xiàng)目</dt> <dd>自定義列表描述</dd></dl><table> <caption>表格標(biāo)題</caption> <!-- 設(shè)置表格中列 --> <col align="right" /> <thead> <tr> <th>表格頭欄目</th> </tr> </thead> <tbody> <tr> <td>表格單元格</td> </tr> </tbody> <tfoot> <!-- 設(shè)置表格中多列 --> <colgroup span="1" align="left"></colgroup> <tr> <td>表格單元格</td> </tr> </tfoot></table><div>div</div><nav></nav><header>header</header><footer>footer</footer><section>section</section><article>article</article><aside>aside</aside><hr /><pre class="brush:php;toolbar:false">預(yù)格式文本
塊引用
Commonly used inline elements and characteristics:
<!-- 內(nèi)聯(lián)元素：不獨(dú)占一行，寬、高、行高、豎向padding、豎向margin不可控 --><span>span</span><strong>強(qiáng)調(diào)文本</strong><em>強(qiáng)調(diào)文本</em><a href=""></a><label>label：</label><b>粗體文本</b><var>文本中的變量</var><bdo dir="rtl">定義文字方向ltr/rtl</bdo><code>代碼</code><del>被刪除文本</del><i>斜體文本</i><ins>被插入文本</ins><small>小號(hào)文本</small><sup>上標(biāo)</sup><sub>下標(biāo)</sub><time datatime="2008-08-08">日期/時(shí)間</time><br /><wbr>在文本中何處換行</wbr><q>短引用</q>
Commonly used inline block elements and characteristics:
<!-- 內(nèi)聯(lián)塊元素：不獨(dú)占一行，寬、高、行高、padding、margin可控 --><input type="text"><keygen name="security" /><textarea>多行文本</textarea><button>按鈕</button><select> <optgroup> <option>選項(xiàng)1-1</option> </optgroup> <optgroup> <option>選項(xiàng)2-1</option> </optgroup> </select><iframe frameborder="0" src=""></iframe><img usemap="#map" src="" alt="" /><map name="map" id="map"> <area shape="rect" coords="0, 0, 20, 20" href="" alt=""></map><embed src="no.swf"><object> <param name="min" value="0" /></object><!-- 預(yù)定義范圍內(nèi)的度量 --><meter value="3" min="0" max="10">3/10</meter><!-- progress 進(jìn)度 --><progress value="30" max="100"></progress>
Event reference:
<!-- 常用屬性：類名： class唯一標(biāo)示： id行內(nèi)樣式： style額外提示信息： title是否可編輯： contenteditable = true/false是否可拖拽： draggable = true/false是否自動(dòng)提示： autocomplete = on/offtab鍵次序： tabindex = number私有數(shù)據(jù)： data-*--><!-- window：onafterprint 文檔打印之后運(yùn)行的腳本onbeforeprint 文檔打印之前運(yùn)行的腳本onbeforeunload 文檔卸載之前運(yùn)行的腳本onerror 在錯(cuò)誤發(fā)生時(shí)運(yùn)行的腳本onhaschange 當(dāng)文檔已改變時(shí)運(yùn)行的腳本onload 頁(yè)面結(jié)束加載之后觸發(fā)onmessage 在消息被觸發(fā)時(shí)運(yùn)行的腳本onoffline 當(dāng)文檔離線時(shí)運(yùn)行的腳本ononline 當(dāng)文檔上線時(shí)運(yùn)行的腳本onpagehide 當(dāng)窗口隱藏時(shí)運(yùn)行的腳本onpageshow 當(dāng)窗口成為可見時(shí)運(yùn)行的腳本onpopstate 當(dāng)窗口歷史記錄改變時(shí)運(yùn)行的腳本onredo 當(dāng)文檔執(zhí)行撤銷（redo）時(shí)運(yùn)行的腳本onresize 當(dāng)瀏覽器窗口被調(diào)整大小時(shí)觸發(fā)onstorage 在 Web Storage 區(qū)域更新后運(yùn)行的腳本onundo 在文檔執(zhí)行 undo 時(shí)運(yùn)行的腳本onunload 一旦頁(yè)面已下載時(shí)觸發(fā)（或者瀏覽器窗口已被關(guān)閉）--><!-- form：onblur 元素失去焦點(diǎn)時(shí)運(yùn)行的腳本onchange 在元素值被改變時(shí)運(yùn)行的腳本oncontextmenu 當(dāng)上下文菜單被觸發(fā)時(shí)運(yùn)行的腳本onfocus 當(dāng)元素失去焦點(diǎn)時(shí)運(yùn)行的腳本onformchange 在表單改變時(shí)運(yùn)行的腳本onforminput 當(dāng)表單獲得用戶輸入時(shí)運(yùn)行的腳本oninput 當(dāng)元素獲得用戶輸入時(shí)運(yùn)行的腳本oninvalid 當(dāng)元素?zé)o效時(shí)運(yùn)行的腳本onreset 當(dāng)表單中的重置按鈕被點(diǎn)擊時(shí)觸發(fā)。HTML5 中不支持onselect 在元素中文本被選中后觸發(fā)onsubmit 在提交表單時(shí)觸發(fā)--><!-- 鍵盤事件：onkeydown 在用戶按下按鍵時(shí)觸發(fā)onkeypress 在用戶敲擊按鈕時(shí)觸發(fā)onkeyup 當(dāng)用戶釋放按鍵時(shí)觸發(fā)--><!-- 鼠標(biāo)事件：onclick 元素上發(fā)生鼠標(biāo)點(diǎn)擊時(shí)觸發(fā)ondblclick 元素上發(fā)生鼠標(biāo)雙擊時(shí)觸發(fā)ondrag 元素被拖動(dòng)時(shí)運(yùn)行的腳本ondragend 在拖動(dòng)操作末端運(yùn)行的腳本ondragenter 當(dāng)元素元素已被拖動(dòng)到有效拖放區(qū)域時(shí)運(yùn)行的腳本ondragleave 當(dāng)元素離開有效拖放目標(biāo)時(shí)運(yùn)行的腳本ondragover 當(dāng)元素在有效拖放目標(biāo)上正在被拖動(dòng)時(shí)運(yùn)行的腳本ondragstart 在拖動(dòng)操作開端運(yùn)行的腳本ondrop 當(dāng)被拖元素正在被拖放時(shí)運(yùn)行的腳本onmousedown 當(dāng)元素上按下鼠標(biāo)按鈕時(shí)觸發(fā)onmousemove 當(dāng)鼠標(biāo)指針移動(dòng)到元素上時(shí)觸發(fā)onmouseout 當(dāng)鼠標(biāo)指針移出元素時(shí)觸發(fā)onmouseover 當(dāng)鼠標(biāo)指針移動(dòng)到元素上時(shí)觸發(fā)onmouseup 當(dāng)在元素上釋放鼠標(biāo)按鈕時(shí)觸發(fā)onmousewheel 當(dāng)鼠標(biāo)滾輪正在被滾動(dòng)時(shí)運(yùn)行的腳本onscroll 當(dāng)元素滾動(dòng)條被滾動(dòng)時(shí)運(yùn)行的腳本--><!-- 媒體事件：onabort 在退出時(shí)運(yùn)行的腳本oncanplay 當(dāng)文件就緒可以開始播放時(shí)運(yùn)行的腳本（緩沖已足夠開始時(shí)）oncanplaythrough 當(dāng)媒介能夠無(wú)需因緩沖而停止即可播放至結(jié)尾時(shí)運(yùn)行的腳本ondurationchange 當(dāng)媒介長(zhǎng)度改變時(shí)運(yùn)行的腳本onemptied 當(dāng)發(fā)生故障并且文件突然不可用時(shí)運(yùn)行的腳本（比如連接意外斷開時(shí)）onended 當(dāng)媒介已到達(dá)結(jié)尾時(shí)運(yùn)行的腳本（可發(fā)送類似“感謝觀看”之類的消息）onerror 當(dāng)在文件加載期間發(fā)生錯(cuò)誤時(shí)運(yùn)行的腳本onloadeddata 當(dāng)媒介數(shù)據(jù)已加載時(shí)運(yùn)行的腳本onloadedmetadata 當(dāng)元數(shù)據(jù)（比如分辨率和時(shí)長(zhǎng)）被加載時(shí)運(yùn)行的腳本onloadstart 在文件開始加載且未實(shí)際加載任何數(shù)據(jù)前運(yùn)行的腳本onpause 當(dāng)媒介被用戶或程序暫停時(shí)運(yùn)行的腳本onplay 當(dāng)媒介已就緒可以開始播放時(shí)運(yùn)行的腳本onplaying 當(dāng)媒介已開始播放時(shí)運(yùn)行的腳本onprogress 當(dāng)瀏覽器正在獲取媒介數(shù)據(jù)時(shí)運(yùn)行的腳本onratechange 每當(dāng)回放速率改變時(shí)運(yùn)行的腳本（比如當(dāng)用戶切換到慢動(dòng)作或快進(jìn)模式）onreadystatechange 每當(dāng)就緒狀態(tài)改變時(shí)運(yùn)行的腳本（就緒狀態(tài)監(jiān)測(cè)媒介數(shù)據(jù)的狀態(tài)）onseeked 當(dāng) seeking 屬性設(shè)置為 false（指示定位已結(jié)束）時(shí)運(yùn)行的腳本onseeking 當(dāng) seeking 屬性設(shè)置為 true（指示定位是活動(dòng)的）時(shí)運(yùn)行的腳本onstalled 在瀏覽器不論何種原因未能取回媒介數(shù)據(jù)時(shí)運(yùn)行的腳本onsuspend 在媒介數(shù)據(jù)完全加載之前不論何種原因終止取回媒介數(shù)據(jù)時(shí)運(yùn)行的腳本ontimeupdate 當(dāng)播放位置改變時(shí)（比如當(dāng)用戶快進(jìn)到媒介中一個(gè)不同的位置時(shí)）運(yùn)行的腳本onvolumechange 每當(dāng)音量改變時(shí)（包括將音量設(shè)置為靜音）時(shí)運(yùn)行的腳本onwaiting 當(dāng)媒介已停止播放但打算繼續(xù)播放時(shí)（比如當(dāng)媒介暫停已緩沖更多數(shù)據(jù)）運(yùn)行腳本-->
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