JS 参考手册

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JavaScript

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HTML DOM

DOM Attributes DOM Document DOM Element DOM Events DOM Event 对象 DOM HTMLCollection DOM Location DOM Navigator DOM Screen DOM Style
alignContent alignItems alignSelf animation animationDelay animationDirection animationDuration animationFillMode animationIterationCount animationName animationTimingFunction animationPlayState background backgroundAttachment backgroundColor backgroundImage backgroundPosition backgroundRepeat backgroundClip backgroundOrigin backgroundSize backfaceVisibility border borderBottom borderBottomColor borderBottomLeftRadius borderBottomRightRadius borderBottomStyle borderBottomWidth borderCollapse borderColor borderImage borderImageOutset borderImageRepeat borderImageSlice borderImageSource borderImageWidth borderLeft borderLeftColor borderLeftStyle borderLeftWidth borderRadius borderRight borderRightColor borderRightStyle borderRightWidth borderSpacing borderStyle borderTop borderTopColor borderTopLeftRadius borderTopRightRadius borderTopStyle borderTopWidth borderWidth bottom boxShadow boxSizing captionSide caretColor clear clip color columnCount columnFill columnGap columnRule columnRuleColor columnRuleStyle columnRuleWidth columns columnSpan columnWidth counterIncrement counterReset cursor direction display emptyCells filter flex flexBasis flexDirection flexFlow flexGrow flexShrink flexWrap cssFloat font fontFamily fontSize fontStyle fontVariant fontWeight fontSizeAdjust height isolation justifyContent left letterSpacing lineHeight listStyle listStyleImage listStylePosition listStyleType margin marginBottom marginLeft marginRight marginTop maxHeight maxWidth minHeight minWidth objectFit objectPosition opacity order orphans outline outlineColor outlineOffset outlineStyle outlineWidth overflow overflowX overflowY padding paddingBottom paddingLeft paddingRight paddingTop pageBreakAfter pageBreakBefore pageBreakInside perspective perspectiveOrigin position quotes resize right scrollBehavior tableLayout tabSize textAlign textAlignLast textDecoration textDecorationColor textDecorationLine textDecorationStyle textIndent textOverflow textShadow textTransform top transform transformOrigin transformStyle transition transitionProperty transitionDuration transitionTimingFunction transitionDelay unicodeBidi userSelect verticalAlign visibility width wordBreak wordSpacing wordWrap widows zIndex
DOM Window

Web APIs

API Console API Geolocation API History API Storage

HTML 对象

<a> <abbr> <address> <area> <article> <aside> <audio> <b> <base> <bdo> <blockquote> <body> <br> <button> <canvas> <caption> <cite> <code> <col> <colgroup> <datalist> <dd> <del> <details> <dfn> <dialog> <div> <dl> <dt> <em> <embed> <fieldset> <figcaption> <figure> <footer> <form> <head> <header> <h1> - <h6> <hr> <html> <i> <iframe> <img> <ins> <input> button <input> checkbox <input> color <input> date <input> datetime <input> datetime-local <input> email <input> file <input> hidden <input> image <input> month <input> number <input> password <input> radio <input> range <input> reset <input> search <input> submit <input> text <input> time <input> url <input> week <kbd> <label> <legend> <li> <link> <map> <mark> <menu> <menuitem> <meta> <meter> <nav> <object> <ol> <optgroup> <option> <output> <p> <param> <pre> <progress> <q> <s> <samp> <script> <section> <select> <small> <source> <span> <strong> <style> <sub> <summary> <sup> <table> <tbody> <td> <tfoot> <th> <thead> <tr> <textarea> <time> <title> <track> <u> <ul> <var> <video>

其他参考手册

CSSStyleDeclaration JS 类型转换


onclick 事件

❮ DOM 事件 ❮ MouseEvent

实例

单击按钮时执行 JavaScript:

<button onclick="myFunction()">Click me</button>
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页面下方有更多实例。


定义和用法

onclick 事件在用户单击元素时发生。


浏览器支持

事件
onclick Yes Yes Yes Yes Yes

语法

在 HTML 中:

<element onclick="myScript">
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在 JavaScript 中:

object.onclick = function(){myScript};
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在 JavaScript 中,使用 addEventListener() 方法:

object.addEventListener("click", myScript);
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注释:Internet Explorer 8 或更早的版本不支持 addEventListener() 方法



技术细节

是否支持冒泡: Yes
是否支持取消: Yes
事件类型: MouseEvent
支持的 HTML 标签: 所有 HTML 元素,除了: <base>, <bdo>, <br>, <head>, <html>, <iframe>, <meta>, <param>, <script>, <style>, and <title>
DOM 版本: Level 2 Events

更多实例

实例

单击 <button> 元素来显示当前日期、日期和时间:

<button onclick="getElementById('demo').innerHTML = Date()">What is the time?</button>
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实例

单击 <p> 元素将其文本颜色更改为红色:

<p id="demo" onclick="myFunction()">Click me to change my text color.</p>

<script>
function myFunction() {
  document.getElementById("demo").style.color = "red";
}
</script>
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实例

关于如何通过单击来更改 <p> 元素颜色的另一个例子:

<p onclick="myFunction(this, 'red')">Click me to change my text color.</p>

<script>
function myFunction(elmnt,clr) {
  elmnt.style.color = clr;
}
</script>
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实例

单击按钮将一些文本从输入字段复制到另一个输入字段:

<button onclick="myFunction()">Copy Text</button>

<script>
function myFunction() {
  document.getElementById("field2").value = document.getElementById("field1").value;
}
</script>
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实例

把 "onclick" 事件分配给 window 对象:

window.onclick = myFunction;

// 如果用户在窗口中点击,将 <body> 的背景颜色设置为黄色
function myFunction() {
  document.getElementsByTagName("BODY")[0].style.backgroundColor = "yellow";
}
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实例

使用 onclick 创建下拉按钮:

// 获取按钮,当用户点击时,执行myFunction
document.getElementById("myBtn").onclick = function() {myFunction()};

/* myFunction 在添加和删除显示类之间切换,用于隐藏和显示下拉内容 */
function myFunction() {
  document.getElementById("myDropdown").classList.toggle("show");
}
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相关页面

JavaScript 教程: JavaScript Events

HTML DOM 参考手册: ondblclick 事件

HTML DOM 参考手册: onmousedown 事件

HTML DOM 参考手册: onmouseup 事件


❮ DOM 事件 ❮ MouseEvent