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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

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<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>

Style margin 属性


实例

更改 div 元素的外边距:

document.getElementById("myDiv").style.margin = "50px 10px 20px 30px";
亲自试一试 »

定义和用法

margin 属性设置或返回元素的外边距。

该属性可使用 1 到 4 种值:

  • 如果规定一种值,比如:div {margin: 50px} - 所有四个外边距都是 50px。
  • 如果规定两种值,比如:div {margin: 50px 10px} - 上外边距和下外边距是 50px,左外边距和右外边距是 10px。
  • 如果规定三种值,比如:div {margin: 50px 10px 20px}- 上外边距是 50px,左外边距和右外边距是 10px,下外边距是 20px。
  • 如果规定四种值,比如:div {margin: 50px 10px 20px 30px} - 上外边距是 50px,右外边距是 10px,下外边距是 20px,左外边距是 30px。

提示: margin 属性和 padding 属性都是在元素周围插入空间。然而,不同的是,margin 将围绕边框外面插入空间,padding 将在元素边框内插入空间。


浏览器支持

属性
margin Yes Yes Yes Yes Yes

语法

返回 margin 属性:

object.style.margin

设置 margin 属性:

object.style.margin = "%|length|auto|initial|inherit"

属性值

描述
% 定义基于父元素宽度的百分比外边距。
length 使用 px、cm 等单位定义外边距的宽度。
auto 浏览器设定的外边距(所有四个外边距是相等的)。
initial 设置该属性为它的默认值。请参阅 initial
inherit 从父元素继承该属性。请参阅 inherit

技术细节

默认值: 0
返回值: 一个字符串,表示元素的边距
CSS 版本 CSS1

更多实例

实例

将<div> 元素的所有四个边距更改为 "25px":

document.getElementById("myDiv").style.margin = "25px";
亲自试一试 »

实例

返回<div> 元素的边距:

alert(document.getElementById("myDiv").style.margin);
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实例

对比 margin 属性和 padding 属性之间的差异:

function changeMargin() {
  document.getElementById("myDiv").style.margin = "100px";
}

function changePadding() {
  document.getElementById("myDiv2").style.padding = "100px";
}
亲自试一试 »

相关页面

CSS 教程: CSS Margin

CSS 参考手册: margin 属性


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