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JS 参考手册

JS 参考手册(字母排序)

JavaScript

JS Arrays JS Boolean JS Classes JS Dates JS Error JS Global JS Iterators JS JSON JS Maps JS Math JS Numbers JS Objects JS Operators JS Assignment JS Arithmetic JS Comparison JS Logical Operators JS Bitwise Operators JS Misc Operators JS Precedence JS Promises JS RegExp Patterns JS RegExp Reference JS Sets JS Statements JS Strings JS Typed Arrays JS Typed Reference

Window

Window Object Window Console Window History Window Location Window Navigator Window Screen

HTML DOM

HTML Documents HTML Elements HTML Attributes HTML Collection HTML NodeList HTML DOMTokenList HTML Styles
alignContent alignItems alignSelf animation animationDelay animationDirection animationDuration animationFillMode animationIterationCount animationName animationTimingFunction animationPlayState background backgroundAttachment backgroundClip backgroundColor backgroundImage backgroundOrigin backgroundPosition backgroundRepeat 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 cssFloat cursor direction display emptyCells filter flex flexBasis flexDirection flexFlow flexGrow flexShrink flexWrap 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

HTML Events

HTML Events HTML Event Objects HTML Event Properties HTML Event Methods

Web APIs

API Canvas API Console API Fetch API Fullscreen API Geolocation API History API MediaQueryList API Storage API Validation API Web

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> <sub> <summary> <sup> <table> <tbody> <td> <tfoot> <th> <thead> <tr> <textarea> <time> <title> <track> <u> <ul> <var> <video>

HTML DOM fullscreenEnabled() 方法


实例

在全屏模式下显示<video> 元素:

/* 获取要全屏显示的元素 */
var elem = document.getElementById("myvideo");

/* 打开全屏模式的功能 */
function openFullscreen() {
  /* 如果全屏模式可用,则全屏显示元素 */
  if (document.fullscreenEnabled) {
    /* 全屏显示元素 */
    elem.requestFullscreen();
  }
}
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定义和用法

fullscreenEnabled() 方法返回一个布尔值,指示是否可以在全屏模式下查看文档。

如果全屏模式可用,则 fullscreenEnabled() 方法返回true,否则返回false。

注释: 这种方法需要特定的前缀才能在不同的浏览器中使用(请参见下面的浏览器支持)。

提示: 使用 element.requestFullscreen() 方法以全屏模式查看元素。

提示: 使用 element.exitFullscreen() 方法取消全屏模式。


浏览器支持

表中的数字表示支持该方法的第一个浏览器版本。 注释: 每个浏览器都需要特定的前缀(请参见括号):

方法
fullscreenEnabled() 45.0 (webkit) 11.0 (ms) 47.0 (moz) 5.1 (webkit) 15.0 (webkit)

实例

为跨浏览器代码使用前缀:

/* 如果全屏模式可用,那么做点什么 */
if (
  document.fullscreenEnabled || /* 标准语法 */
  document.webkitFullscreenEnabled || /* Chrome, Safari 和 Opera 语法 */
  document.mozFullScreenEnabled ||/* Firefox 语法 */
  document.msFullscreenEnabled/* IE/Edge 语法 */
) {
...
}
亲自试一试 »

语法

document.fullscreenEnabled()

参数

None

技术细节

返回值: 一个布尔值,指示是否可以全屏模式查看文档:
  • true - 可以全屏模式查看文档
  • false - 无法在全屏模式下查看文档

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