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
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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


onfocusout 事件

❮ DOM 事件 ❮ FocusEvent

实例

当输入字段即将失去焦点时执行 JavaScript:

<input type="text" onfocusout="myFunction()">
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页面下方有更多实例。


定义和用法

onfocusout 事件发生在元素即将失去焦点时。

提示: onfocusout 事件类似于 onblur 事件。主要区别在于 onblur 事件不会冒泡。因此,如果您想找出元素或其子元素是否失去焦点,则应使用 onfocusout 事件。

提示:虽然 Firefox 不支持 onfocusout 事件,但您可以通过使用 onblur 事件的捕获侦听器(使用 addEventListener() 方法的可选 useCapture 参数)来了解元素的子元素是否失去焦点。

提示: onfocusout 事件与 onfocusin 事件相反。


浏览器支持

表中的数字表示支持该事件的第一个浏览器版本。

事件
onfocusout Yes Yes 52.0 Yes Yes

注释: onfocusout 事件在使用 JavaScript HTML DOM 语法的 Chrome、Safari 和 Opera 15+ 中可能无法按预期工作。但是,它应该作为 HTML 属性并使用 addEventListener() 方法(请参见下面的语法示例)。



语法

在 HTML 中:

<element onfocusout="myScript">
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In JavaScript (may not work as expected in Chrome, Safari and Opera 15+):

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

object.addEventListener("focusout", 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: No
事件类型: FocusEvent
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

将 "onfocusin" 与 "onfocusout" 事件一起使用:

<input type="text" onfocusin="focusFunction()" onfocusout="blurFunction()">
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实例

事件委托:将 addEventListener() 的 useCapture 参数设置为 true(用于 focus 和 blur):

<form id="myForm">
  <input type="text" id="myInput">
</form>

<script>
var x = document.getElementById("myForm");
x.addEventListener("focus", myFocusFunction, true);
x.addEventListener("blur", myBlurFunction, true);

function myFocusFunction() {
  document.getElementById("myInput").style.backgroundColor = "yellow";
}

function myBlurFunction() {
  document.getElementById("myInput").style.backgroundColor = "";
}
</script>
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实例

事件委托:使用 focusin 事件:

<form id="myForm">
  <input type="text" id="myInput">
</form>

<script>
var x = document.getElementById("myForm");
x.addEventListener("focusin", myFocusFunction);
x.addEventListener("focusout", myBlurFunction);

function myFocusFunction() {
  document.getElementById("myInput").style.backgroundColor = "yellow";
}

function myBlurFunction() {
  document.getElementById("myInput").style.backgroundColor = "";
}
</script>
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❮ DOM 事件 ❮ FocusEvent