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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HTML vs. CSS vs. JavaScript: A Comparative OverviewApr 16, 2025 am 12:04 AMThe roles of HTML, CSS and JavaScript in web development are: HTML is responsible for content structure, CSS is responsible for style, and JavaScript is responsible for dynamic behavior. 1. HTML defines the web page structure and content through tags to ensure semantics. 2. CSS controls the web page style through selectors and attributes to make it beautiful and easy to read. 3. JavaScript controls web page behavior through scripts to achieve dynamic and interactive functions.
HTML: Is It a Programming Language or Something Else?Apr 15, 2025 am 12:13 AMHTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.
HTML: Building the Structure of Web PagesApr 14, 2025 am 12:14 AMHTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.
From Text to Websites: The Power of HTMLApr 13, 2025 am 12:07 AMHTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.
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DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
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