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JavaScript & HTML DOM Reference Manual

Overview

JavaScript Object

JavaScript Array Object JavaScript Boolean Object JavaScript Date Object JavaScript Math Object JavaScript Number Object JavaScript String Object JavaScript RegExp Object JavaScript Global properties / functions JavaScript Operator

Browser Object

Window Object Navigator Object Screen Object History Object Location Object

DOM Object

HTML DOM Document Object HTML DOM Element object HTML DOM Attribute object HTML DOM Event object

HTML Object

<a> <area> <audio> <base> <blockquote> <body> <button> <canvas> <col> <colgroup> <datalist> <del> <details> <dialog> <embed> <fieldset> <form> <iframe> <frameset > <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> - range <input> - password <input> - radio <input> - reset <input> - search <input> - submit <input> - text <input> - time <input> - url <input> - week <keygen> <link> <label> <legend> <li> <map> <menu> <menuItem> <meta> <meter> <object> <ol> <optgroup> <option> <param> <progress> <q> <script> <select> <source> <style> <table> <td> <th> <tr> <textarea> <title> <time> <track> <video>

HTML DOM hasChildNodes method

Previous: HTML DOM id attribute

Next: HTML DOM getElementsByTagName () method

Examples

See all the child nodes of an element:

document.getElementById("myList").hasChildNodes()

Output:

true

Definition and Usage

hasChildNodes () method returns true when a node for any child nodes, otherwise it returns false.

Browser Support

All major browsers support hasChildNodes () method

grammar

node.hasChildNodes()

parameter

None

return value

类型	描述
Boolean	如果节点有子节点则返回true ，否则返回false。

technical details

DOM version	Core Level 1 Node Object

Previous: HTML DOM id attribute

Next: HTML DOM getElementsByTagName () method