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JS 参考手册

JS 参考手册(字母排序)

JavaScript

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Window

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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>

JavaScript JSON stringify() 方法


实例

字符串化 JavaScript 对象:

var obj = { "name":"John", "age":30, "city":"New York"};
var myJSON = JSON.stringify(obj);
document.getElementById("demo").innerHTML = myJSON;
亲自试一试 »

页面下方有更多实例。


定义和用法

JSON.stringify() 方法将 JavaScript 对象转换为字符串。

将数据发送到 Web 服务器时,数据必须是字符串。


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。

方法
stringify() 4.0 8.0 3.5 4.0 11.5

语法

JSON.stringify(obj, replacer, space)

参数值

参数 描述
obj 必需。要转换为字符串的值。
replacer

可选。用于转换结果的函数或数组。

如果该参数是函数,则在序列化过程中,被序列化的值的每个属性都会经过该函数的转换和处理;

如果该参数是数组,则只有包含在这个数组中的属性名才会被序列化到最终的 JSON 字符串中;

如果该参数为 null 或者未提供,则对象所有的属性都会被序列化。

space

可选。字符串或数字值。指定缩进用的空白字符串,用于美化输出(pretty-print)。

如果参数是个数字,它代表有多少的空格;上限为 10。该值若小于 1,则意味着没有空格;

如果该参数为字符串(当字符串长度超过 10 个字母,取其前 10 个字母),该字符串将被作为空格;

如果该参数没有提供(或者为 null),将没有空格。


技术细节

返回值: A String
JavaScript 版本: ECMAScript 5

更多实例

实例

使用 replacer 替换函数:

/*将 "city" 的值替换为大写:*/
var obj = { "name":"John", "age":"39", "city":"New York"};
var text = JSON.stringify(obj, function (key, value) {
  if (key == "city") {
    return value.toUpperCase();
  } else {
    return value;
  }
});
亲自试一试 »

实例

使用 space 参数:

/*为每个空格插入 10 个空格字符:*/
var obj = { "name":"John", "age":"39", "city":"New York"};
var text = JSON.stringify(obj, null, 10);
亲自试一试 »

实例

使用 space 参数:

/*为每个空格插入单词 SPACE:*/
var obj = { "name":"John", "age":"39", "city":"New York"};
var text = JSON.stringify(obj, null, "SPACE");
亲自试一试 »

相关页面

JSON 教程: JSON 简介


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