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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>

RegExp? Quantifier

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RegExp Object Reference

JavaSript RegExp objects

Definition and Usage

n?contain any string of zero or anquantifiers match.

grammar

new RegExp("n?")

或者更简单方式：

/n?/

Browser Support

All major browsers support? Quantifier.

Examples

Examples

To "1" in the global search, including zero or followed immediately by a "0":

var str="1, 100 or 1000?";
var patt1=/10?/g;

The marked text below shows where the expression gets a match:

1 , 10 0 or 10 00?

RegExp Object Reference

JavaSript RegExp objects

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