JS 参考手册

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JavaScript

JS Array JS Boolean JS Classes JS Date JS Error JS Global JS JSON JS Math JS Number JS 运算符 JS RegExp JS 语句 JS String

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


KeyboardEvent location 属性

❮ DOM 事件 ❮ KeyboardEvent

实例

获取按键的位置:

var x = event.location;
亲自试一试 »

定义和用法

location 属性返回一个数字,指示键盘或设备上的按键的位置。

该数字由 4 个常量表示:

0. DOM_KEY_LOCATION_STANDARD:

该键未在键盘的右侧或左侧按下,也未在数字小键盘上按下(该值代表键盘上几乎每个键,例如 "A"、"U"、"SPACE" 或 "5")

1. DOM_KEY_LOCATION_LEFT:

按下了左键(例如,标准 101 键美国键盘上的左 "CTRL" 键或左 "ALT" 键)

2. DOM_KEY_LOCATION_RIGHT:

按下了右键(例如,标准 101 键美国键盘上的右 "CTRL" 键或右 "ALT" 键)

3. DOM_KEY_LOCATION_NUMPAD:

在数字小键盘上按下该键(例如,标准键盘右侧的 "2" 键)

注释:location 属性只能用于 onkeydownonkeyup 事件,不能用于 onkeypress

注释:该属性是只读的。


浏览器支持

表中的数字表示支持该属性的第一个浏览器版本。

属性
location Yes 9.0 15.0 不支持 Yes

语法

event.location

技术细节

返回值:

数字值,表示键盘或设备上按键的位置。

该数字由 4 个常量表示:

  • 0. DOM_KEY_LOCATION_STANDARD
  • 1. DOM_KEY_LOCATION_LEFT
  • 2. DOM_KEY_LOCATION_RIGHT
  • 3. DOM_KEY_LOCATION_NUMPAD
DOM 版本: DOM Level 3 Events

❮ DOM 事件 ❮ KeyboardEvent