window、document、html、body、element的事件属性比较_html/css_WEB-ITnose
在分析jQuery的事件的时候有提到绑定事件的方式：
Dean Edwards的跨浏览器事件绑定使用的方式是
element["on" + type] = handleEvent;
即绑定的事件的前提条件是element.onxxx属性必须存在。
jQuery的绑定方式是使用浏览器的绑定绑定方法
if ( elem.addEventListener ) { elem.addEventListener( type, eventHandle, false );} else if ( elem.attachEvent ) { elem.attachEvent( "on" + type, eventHandle );}为什么不用Dean Edwards使用的方式来绑定？
原因：
并非所有浏览器支持的事件都有对应的["on" + type]属性。比较典型的例子动画事件
<br /><p>该实例使用了 addEventListener() 方法为 DIV 元素添加"animationstart", "animationiteration" 和 "animationend" 事件。</p><div id="myDIV" >点我开始动画</div><script>var x = document.getElementById("myDIV")//存在onclick属性x.onclick = myFunction;// 使用 JavaScript 开始动画function myFunction() { //x.style.WebkitAnimation = "mymove 4s 2"; // Chrome, Safari 和 Opera 代码 x.style.animation = "mymove 4s 2";}// Chrome, Safari 和 Opera//x.addEventListener("webkitAnimationStart", myStartFunction);//x.addEventListener("webkitAnimationIteration", myIterationFunction);//x.addEventListener("webkitAnimationEnd", myEndFunction);x.addEventListener("<strong>animationstart</strong>", myStartFunction);x.addEventListener("<strong>animationiteration</strong>", myIterationFunction);x.addEventListener("<strong>animationend</strong>", myEndFunction);function myStartFunction() { this.innerHTML = "animationstart 事件触发 - 动画已经开始"; this.style.backgroundColor = "pink";}function myIterationFunction() { this.innerHTML = "animationiteration 事件触发 - 动画重新播放"; this.style.backgroundColor = "lightblue";}function myEndFunction() { this.innerHTML = "animationend 事件触发 - 动画已经完成"; this.style.backgroundColor = "lightgray";}</script>上面的例子在IE10+、webkit4.0+内核浏览器（chrome、Opera、safari)、Firefox16.0+都能正常运行。但是如果将动画的绑定事件换成
x.onanimationstart = myStartFunction;x.onanimationiteration = myIterationFunction;x.onanimationend = myEndFunction;
三个动画函数没有任何一个能够正常运行。
所以现在明白jQuery为什么使用原生的事件绑定方法了吧。
document.documentElement即html标签的DOM对象
document.body即body标点的DOM对象
以chrome/IE8/IE9/firefox为例，简易的比较一下window、document、html、body、element的onxxx属性
说明：表格中yes表示对象拥有该属性，否则没有
chrome45.0中所有的onxxx属性
| on事件 | window | document | html | body | element |
| onabort | yes | yes | yes | yes | yes |
| onanimationend | yes | ||||
| onanimationiteration | yes | ||||
| onanimationstart | yes | ||||
| onautocomplete | yes | yes | yes | yes | yes |
| onautocompleteerror | yes | yes | yes | yes | yes |
| onbeforeunload | yes | yes | |||
| onbeforecopy | yes | yes | yes | yes | |
| onbeforecut | yes | yes | yes | yes | |
| onbeforepaste | yes | yes | yes | yes | |
| onblur | yes | yes | yes | yes | yes |
| oncancel | yes | yes | yes | yes | yes |
| oncanplay | yes | yes | yes | yes | yes |
| oncanplaythrough | yes | yes | yes | yes | yes |
| onchange | yes | yes | yes | yes | yes |
| onclick | yes | yes | yes | yes | yes |
| onclose | yes | yes | yes | yes | yes |
| oncontextmenu | yes | yes | yes | yes | yes |
| oncuechange | yes | yes | yes | yes | yes |
| ondblclick | yes | yes | yes | yes | yes |
| ondevicemotion | yes | yes | yes | yes | yes |
| ondeviceorientation | yes | yes | yes | yes | yes |
| ondrag | yes | yes | yes | yes | yes |
| ondragend | yes | yes | yes | yes | yes |
| ondragenter | yes | yes | yes | yes | yes |
| ondragleave | yes | yes | yes | yes | yes |
| ondragover | yes | yes | yes | yes | yes |
| ondragstart | yes | yes | yes | yes | yes |
| ondrop | yes | yes | yes | yes | yes |
| ondurationchange | yes | yes | yes | yes | yes |
| onemptied | yes | yes | yes | yes | yes |
| onended | yes | yes | yes | yes | yes |
| onerror | yes | yes | yes | yes | yes |
| onfocus | yes | yes | yes | yes | yes |
| onhashchange | yes | yes | |||
| oninput | yes | yes | yes | yes | yes |
| oninvalid | yes | yes | yes | yes | yes |
| onkeydown | yes | yes | yes | yes | yes |
| onkeypress | yes | yes | yes | yes | yes |
| onkeyup | yes | yes | yes | yes | yes |
| onlanguagechange | yes | yes | |||
| onload | yes | yes | yes | yes | yes |
| onloadeddata | yes | yes | yes | yes | yes |
| onloadedmetadata | yes | yes | yes | yes | yes |
| onloadstart | yes | yes | yes | yes | yes |
| onmessage | yes | yes | |||
| onmousedown | yes | yes | yes | yes | yes |
| onmouseenter | yes | yes | yes | yes | yes |
| onmouseleave | yes | yes | yes | yes | yes |
| onmousemove | yes | yes | yes | yes | yes |
| onmouseout | yes | yes | yes | yes | yes |
| onmouseover | yes | yes | yes | yes | yes |
| onmouseup | yes | yes | yes | yes | yes |
| onmousewheel(不推荐，用onwheel替代) | yes | yes | yes | yes | yes |
| onoffline | yes | yes | |||
| ononline | yes | yes | |||
| onpagehide | yes | yes | |||
| onpageshow | yes | yes | |||
| onpaste | yes | yes | yes | yes | |
| onpause | yes | yes | yes | yes | yes |
| onplay | yes | yes | yes | yes | yes |
| onplaying | yes | yes | yes | yes | yes |
| onpopstate | yes | yes | |||
| onpointerlockchange | yes | ||||
| onpointerlockerror | yes | ||||
| onprogress | yes | yes | yes | yes | yes |
| onratechange | yes | yes | yes | yes | yes |
| onreadystatechange | yes | ||||
| onreset | yes | yes | yes | yes | yes |
| onresize | yes | yes | yes | yes | yes |
| onscroll | yes | yes | yes | yes | yes |
| onsearch | yes | yes | yes | yes | yes |
| onseeked | yes | yes | yes | yes | yes |
| onseeking | yes | yes | yes | yes | yes |
| onselect | yes | yes | yes | yes | yes |
| onselectionchange | yes | ||||
| onselectstart | yes | yes | yes | yes | |
| onshow | yes | yes | yes | yes | yes |
| onstalled | yes | yes | yes | yes | yes |
| onstorage | yes | yes | |||
| onsubmit | yes | yes | yes | yes | yes |
| onsuspend | yes | yes | yes | yes | yes |
| ontimeupdate | yes | yes | yes | yes | yes |
| ontoggle | yes | yes | yes | yes | yes |
| ontransitionend | yes | ||||
| onunload | yes | yes | |||
| onvolumechange | yes | yes | yes | yes | yes |
| onwaiting | yes | yes | yes | yes | yes |
| onwebkitfullscreenchange | yes | yes | yes | yes | |
| onwebkitfullscreenerror | yes | yes | yes | yes | |
| onwebkitanimationend | yes | ||||
| onwebkitanimationiteration | yes | ||||
| onwebkitanimationstart | yes | ||||
| onwebkittransitionend | yes | ||||
| onwheel | yes | yes | yes | yes | yes |
chrome浏览器的事件基本都都列在上面了，基本上每个事件都有.onxxx属性，连animationend这样的HTML5新事件都包含在里面了，不过需要加webkit前缀。除了一下几个比较特殊的以外：
没有onfocusin，但是支持focusin事件
没有onfocusout，但是支持focusout事件
不支持打印事件:onafterprint、onbeforeprint
Safari 3.1 到 6.0 版本才支持transitionend事件, 使用webkitTransitionEnd来绑定
查看事件的具体作用推荐：菜鸟教程HTML DOM事件
IE9中所有的onxxx属性
| on事件 | window | document | html | body | element |
| onabort | yes | yes | yes | yes | yes |
| onactivate | yes | yes | yes | yes | |
| onafterprint | yes | yes | |||
| onafterupdate | yes | yes | yes | yes | |
| onbeforeactivate | yes | yes | yes | yes | |
| onbeforecopy | yes | yes | yes | ||
| onbeforecut | yes | yes | yes | ||
| onbeforedeactivate | yes | yes | yes | yes | |
| onbeforeeditfocus | yes | yes | yes | yes | |
| onbeforepaste | yes | yes | yes | ||
| onbeforeprint | yes | yes | |||
| onbeforeunload | yes | yes | |||
| onbeforeupdate | yes | yes | yes | yes | |
| onblur | yes | yes | yes | yes | yes |
| oncanplay | yes | yes | yes | yes | yes |
| oncanplaythrough | yes | yes | yes | yes | yes |
| oncellchange | yes | yes | yes | yes | |
| onchange | yes | yes | yes | yes | yes |
| onclick | yes | yes | yes | yes | yes |
| oncontextmenu | yes | yes | yes | yes | yes |
| oncontrolselect | yes | yes | yes | yes | |
| oncopy | yes | yes | yes | ||
| oncut | yes | yes | yes | ||
| ondataavailable | yes | yes | yes | yes | |
| ondatasetchanged | yes | yes | yes | yes | |
| ondatasetcomplete | yes | yes | yes | yes | |
| ondblclick | yes | yes | yes | yes | yes |
| ondeactivate | yes | yes | yes | yes | |
| ondrag | yes | yes | yes | yes | yes |
| ondragend | yes | yes | yes | yes | yes |
| ondragenter | yes | yes | yes | yes | yes |
| ondragleave | yes | yes | yes | yes | yes |
| ondragover | yes | yes | yes | yes | yes |
| ondragstart | yes | yes | yes | yes | yes |
| ondrop | yes | yes | yes | yes | yes |
| ondurationchange | yes | yes | yes | yes | yes |
| onemptied | yes | yes | yes | yes | yes |
| onended | yes | yes | yes | yes | yes |
| onerror | yes | yes | yes | yes | yes |
| onerrorupdate | yes | yes | yes | yes | |
| onfilterchange | yes | yes | yes | ||
| onfocus | yes | yes | yes | yes | yes |
| onfocusin | yes | yes | yes | yes | yes |
| onfocusout | yes | yes | yes | yes | yes |
| onhashchange | yes | yes | |||
| onhelp | yes | yes | yes | yes | yes |
| oninput | yes | yes | yes | yes | yes |
| onkeydown | yes | yes | yes | yes | yes |
| onkeypress | yes | yes | yes | yes | yes |
| onkeyup | yes | yes | yes | yes | yes |
| onlayoutcomplete | yes | yes | yes | ||
| onload | yes | yes | yes | yes | yes |
| onloadeddata | yes | yes | yes | yes | yes |
| onloadedmetadata | yes | yes | yes | yes | yes |
| onloadstart | yes | yes | yes | yes | yes |
| onlosecapture | yes | yes | yes | ||
| onmessage | yes | yes | |||
| onmousedown | yes | yes | yes | yes | yes |
| onmouseenter | yes | yes | yes | yes | |
| onmouseleave | yes | yes | yes | yes | |
| onmousemove | yes | yes | yes | yes | yes |
| onmouseout | yes | yes | yes | yes | yes |
| onmouseover | yes | yes | yes | yes | yes |
| onmouseup | yes | yes | yes | yes | yes |
| onmousewheel | yes | yes | yes | yes | yes |
| onmove | yes | yes | yes | ||
| onmoveend | yes | yes | yes | ||
| onmovestart | yes | yes | yes | ||
| onmssitemodejumplistitemremoved | yes | ||||
| onmsthumbnailclick | yes | ||||
| onoffline | yes | yes | |||
| ononline | yes | yes | |||
| onpaste | yes | yes | yes | ||
| onpause | yes | yes | yes | yes | yes |
| onplay | yes | yes | yes | yes | yes |
| onplaying | yes | yes | yes | yes | yes |
| onprogress | yes | yes | yes | yes | yes |
| onpropertychange | yes | yes | yes | yes | |
| onratechange | yes | yes | yes | yes | yes |
| onreadystatechange | yes | yes | yes | yes | yes |
| onreset | yes | yes | yes | yes | yes |
| onresize | yes | yes | yes | yes | yes |
| onresizeend | yes | yes | yes | ||
| onresizestart | yes | yes | yes | ||
| onrowenter | yes | yes | yes | ||
| onrowexit | yes | yes | yes | yes | |
| onrowsdelete | yes | yes | yes | yes | |
| onrowsinserted | yes | yes | yes | yes | |
| onscroll | yes | yes | yes | yes | yes |
| onseeked | yes | yes | yes | yes | yes |
| onseeking | yes | yes | yes | yes | yes |
| onselect | yes | yes | yes | yes | yes |
| onselectionchange | yes | ||||
| onselectstart | yes | yes | yes | yes | |
| onstalled | yes | yes | yes | yes | yes |
| onstop | yes | ||||
| onstorage | yes | yes | |||
| onstoragecommit | yes | ||||
| onsubmit | yes | yes | yes | yes | yes |
| onsuspend | yes | yes | yes | yes | yes |
| ontimeupdate | yes | yes | yes | yes | yes |
| onunload | yes | yes | |||
| onvolumechange | yes | yes | yes | yes | yes |
| onwaiting | yes | yes | yes | yes | yes |
有几个特殊的情况：
没有onpageshow，也不支持该事件，需要IE11+才支持
没有onpagehide，也不支持该事件，需要IE11+才支持
没有onsearch，IE所有版本都不支持该事件
没有onshow,IE所有版本都不支持该事件
没有ontoggle,IE所有版本都不支持该事件
没有onanimationend，也不支持该动画事件，需要IE10+才支持
没有onanimationiteration，也不支持该动画事件，需要IE10+才支持
没有onanimationstart，也不支持该动画事件，需要IE10+才支持
没有过渡ontransitionend，也不支持过渡事件，需要IE10+才支持
没有onwheel,但IE9+支持wheel绑定事件，替代onmousewheel
没有onpopstate
IE8中所有的onxxx属性
| on事件 | window | document | html/script /div/a/ button/ span等普通元素 | body | form | iframe | style/link | textarea | select | input(所有type类型) |
| onabort | yes | |||||||||
| onactivate | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onafterprint | yes | yes | ||||||||
| onafterupdate | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |
| onbeforeactivate | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onbeforecopy | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onbeforecut | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onbeforedeactivate | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onbeforeeditfocus | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onbeforepaste | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onbeforeprint | yes | |||||||||
| onbeforeunload | yes | yes | ||||||||
| onbeforeupdate | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onblur | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| oncellchange | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onchange | yes | yes | yes | |||||||
| onclick | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| oncontextmenu | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| oncontrolselect | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| oncopy | yes | yes | yes | yes | yes | yes | yes | yes | ||
| oncut | yes | yes | yes | yes | yes | yes | yes | yes | ||
| ondataavailable | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| ondatasetchanged | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| ondatasetcomplete | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| ondblclick | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| ondeactivate | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| ondrag | yes | yes | yes | yes | yes | yes | yes | yes | ||
| ondragend | yes | yes | yes | yes | yes | yes | yes | yes | ||
| ondragenter | yes | yes | yes | yes | yes | yes | yes | yes | ||
| ondragleave | yes | yes | yes | yes | yes | yes | yes | yes | ||
| ondragover | yes | yes | yes | yes | yes | yes | yes | yes | ||
| ondragstart | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| ondrop | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onerror | yes | yes | ||||||||
| onerrorupdate | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onfilterchange | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onfocus | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onfocusin | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onfocusout | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onhashchange | yes | yes | ||||||||
| onhelp | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |
| onkeydown | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onkeypress | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onkeyup | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onlayoutcomplete | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onload | yes | yes | yes | yes | yes | |||||
| onlosecapture | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onmessage | yes | |||||||||
| onmousedown | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onmouseenter | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onmouseleave | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onmousemove | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onmouseout | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onmouseover | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onmouseup | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onmousewheel | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onmove | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onmoveend | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onmovestart | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onmssitemodejumplistitemremoved | yes | |||||||||
| onmsthumbnailclick | yes | |||||||||
| onoffline | yes | |||||||||
| ononline | yes | |||||||||
| onpage | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onpaste | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onpropertychange | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onreadystatechange | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onreset | yes | |||||||||
| onresize | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onresizeend | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onresizestart | yes | yes | yes | yes | yes | yes | yes | yes | ||
| onrowenter | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onrowexit | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onrowsdelete | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onrowsinserted | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onscroll | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onselect | yes | yes | yes | |||||||
| onselectionchange | yes | |||||||||
| onselectstart | yes | yes | yes | yes | yes | yes | yes | yes | yes | |
| onstop | yes | |||||||||
| onstorage | yes | |||||||||
| onstoragecommit | yes | |||||||||
| onsubmit | yes | |||||||||
| onunload | yes | yes | ||||||||
除了IE9暴露的问题以外还有：
没有oninput,也不支持该事件，需要IE9+才支持
没有多媒体的onxxx属性，也不支持所有的多媒体事件（包括oncanplay/oncanplaythrough/ondurationchange/onemptied...)，需要IE9+才支持
Firefox42.0中所有的onxxx属性
| on事件 | window | document | html | body | element |
| onabort | yes | yes | yes | yes | yes |
| onafterprint | yes | yes | |||
| onbeforeprint | yes | yes | |||
| onbeforeunload | yes | yes | |||
| onafterscriptexecute | yes | ||||
| onbeforescriptexecute | yes | ||||
| onblur | yes | yes | yes | yes | yes |
| oncanplay | yes | yes | yes | yes | yes |
| oncanplaythrough | yes | yes | yes | yes | yes |
| onchange | yes | yes | yes | yes | yes |
| onclick | yes | yes | yes | yes | yes |
| oncontextmenu | yes | yes | yes | yes | yes |
| oncopy | yes | yes | yes | yes | |
| oncut | yes | yes | yes | yes | |
| ondblclick | yes | yes | yes | yes | yes |
| ondevicelight | yes | ||||
| ondevicemotion | yes | ||||
| ondeviceorientation | yes | ||||
| ondeviceproximity | yes | ||||
| ondrag | yes | yes | yes | yes | yes |
| ondragend | yes | yes | yes | yes | yes |
| ondragenter | yes | yes | yes | yes | yes |
| ondragleave | yes | yes | yes | yes | yes |
| ondragover | yes | yes | yes | yes | yes |
| ondragstart | yes | yes | yes | yes | yes |
| ondrop | yes | yes | yes | yes | yes |
| ondurationchange | yes | yes | yes | yes | yes |
| onemptied | yes | yes | yes | yes | yes |
| onended | yes | yes | yes | yes | yes |
| onerror | yes | yes | yes | yes | yes |
| onfocus | yes | yes | yes | yes | yes |
| onhashchange | yes | yes | |||
| oninput | yes | yes | yes | yes | yes |
| oninvalid | yes | yes | yes | yes | yes |
| onkeydown | yes | yes | yes | yes | yes |
| onkeypress | yes | yes | yes | yes | yes |
| onkeyup | yes | yes | yes | yes | yes |
| onlanguagechange | yes | yes | |||
| onload | yes | yes | yes | yes | yes |
| onloadeddata | yes | yes | yes | yes | yes |
| onloadedmetadata | yes | yes | yes | yes | yes |
| onloadstart | yes | yes | yes | yes | yes |
| onmessage | yes | yes | |||
| onmousedown | yes | yes | yes | yes | yes |
| onmouseenter | yes | yes | yes | yes | yes |
| onmouseleave | yes | yes | yes | yes | yes |
| onmousemove | yes | yes | yes | yes | yes |
| onmouseout | yes | yes | yes | yes | yes |
| onmouseover | yes | yes | yes | yes | yes |
| onmouseup | yes | yes | yes | yes | yes |
| onmozfullscreenchange | yes | yes | yes | yes | yes |
| onmozfullscreenerror | yes | yes | yes | yes | yes |
| onmozpointerlockchange | yes | yes | yes | yes | yes |
| onmozpointerlockerror | yes | yes | yes | yes | yes |
| onoffline | yes | yes | |||
| ononline | yes | yes | |||
| onpagehide | yes | yes | |||
| onpageshow | yes | yes | |||
| onpaste | yes | yes | yes | yes | |
| onpause | yes | yes | yes | yes | yes |
| onplay | yes | yes | yes | yes | yes |
| onplaying | yes | yes | yes | yes | yes |
| onpopstate | yes | yes | |||
| onprogress | yes | yes | yes | yes | yes |
| onratechange | yes | yes | yes | yes | yes |
| onreadystatechange | yes | ||||
| onreset | yes | yes | yes | yes | yes |
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Der Artikel erörtert den HTML & lt; Progress & gt; Element, Absicht, Styling und Unterschiede vom & lt; Meter & gt; Element. Das Hauptaugenmerk liegt auf der Verwendung & lt; Fortschritt & gt; Für Aufgabenabschluss und & lt; Meter & gt; für stati
Was ist der Zweck des & lt; Meter & gt; Element?
Mar 21, 2025 pm 12:35 PM
Der Artikel erörtert das HTML & lt; Meter & gt; Element, verwendet zur Anzeige von Skalar- oder Bruchwerten innerhalb eines Bereichs und seine gemeinsamen Anwendungen in der Webentwicklung. Es differenziert & lt; Meter & gt; von & lt; Fortschritt & gt; und Ex
Was ist das Ansichtsfenster -Meta -Tag? Warum ist es wichtig für reaktionsschnelles Design?
Mar 20, 2025 pm 05:56 PM
In dem Artikel wird das Ansichtsfenster -Meta -Tag erörtert, das für das reaktionsschnelle Webdesign auf mobilen Geräten unerlässlich ist. Es wird erläutert, wie die ordnungsgemäße Verwendung eine optimale Skalierung von Inhalten und Benutzerinteraktion gewährleistet, während Missbrauch zu Design- und Zugänglichkeitsproblemen führen kann.
Was ist der Zweck des & lt; iframe & gt; Etikett? Was sind die Sicherheitsüberlegungen bei der Verwendung?
Mar 20, 2025 pm 06:05 PM
Der Artikel erörtert das & lt; iframe & gt; Der Zweck von Tag, externe Inhalte in Webseiten, seine gemeinsamen Verwendungen, Sicherheitsrisiken und Alternativen wie Objekt -Tags und APIs einzubetten.
Wie benutze ich die HTML5 & lt; Zeit & gt; Element, um Daten und Zeiten semantisch darzustellen?
Mar 12, 2025 pm 04:05 PM
Dieser Artikel erklärt den HTML5 & lt; Time & gt; Element für semantische Datum/Uhrzeit. Es betont die Wichtigkeit des DateTime-Attributs für die Maschinenlesbarkeit (ISO 8601-Format) neben menschenlesbarem Text, das Zubehör steigert
Was sind die besten Praktiken für die Kompatibilität des Cross-Browsers in HTML5?
Mar 17, 2025 pm 12:20 PM
In Artikel werden Best Practices zur Gewährleistung der HTML5-Cross-Browser-Kompatibilität erörtert und sich auf die Erkennung von Merkmalen, die progressive Verbesserung und die Testmethoden konzentriert.
Wie verwende ich HTML5 -Formularvalidierungsattribute, um die Benutzereingabe zu validieren?
Mar 17, 2025 pm 12:27 PM
In dem Artikel werden unter Verwendung von HTML5 -Formularvalidierungsattributen wie Erforderlich, Muster, Min, MAX und Längengrenzen erörtert, um die Benutzereingabe direkt im Browser zu validieren.
