JS 参考手册

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JavaScript

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HTML DOM

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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> <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


JavaScript 数组 shift() 方法


实例

删除数组中的第一个项目:

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.shift();
亲自试一试 »

定义和用法

shift() 方法移除数组的第一项。

注释:shift() 方法会改变数组的长度。

注释:shift 方法的返回值是被移除的项目。

注释:shift() 方法会改变原始数组。

提示:如需删除数组的最后一项,请使用 pop() 方法。


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
shift() Yes Yes Yes Yes Yes

语法

array.shift()

参数

无参数。


技术细节

返回值:

任何类型 *,表示被删除的数组项目。

* 数组项目可以是字符串、数字、数组、布尔值或数组中允许的任何其他对象类型。

JavaScript 版本: ECMAScript 1

相关页面

JavaScript 教程: JavaScript 数组

JavaScript 教程: JavaScript 数组方法

JavaScript 参考手册: JavaScript push() 方法

JavaScript 参考手册: JavaScript pop() 方法

JavaScript 参考手册: JavaScript unshift() 方法