JavaScript系列：正则表达式

最新推荐文章于 2025-09-09 16:55:30 发布

转载最新推荐文章于 2025-09-09 16:55:30 发布 · 63 阅读

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原文链接：http://www.cnblogs.com/strinkbug/p/5301333.html

文章标签：

#javascript #ViewUI

本文通过几个具体的JavaScript函数示例介绍了如何使用正则表达式进行字符串匹配及验证电话号码和邮件地址的有效性。

 1 function testExecResultType() {
 2             var txt = "mom and dad and baby";
 3             var pattern = /mom (and day (and baby)?)?/ig;
 4             var match = pattern.exec(txt);
 5             document.writeln("<br>match's type is instanceof array:" + (match instanceof Array));
 6             document.writeln("<br>Array.isArray(matches):" + Array.isArray(match));
 7         }
 8 
 9         function testTelNum() {
10             var p1 = /^1\d{10}$/g;
11             var pattern = new RegExp(p1.source, "g");
12             var telNum1 = "13088888888";
13             var telNum2 = "13300008888";
14             document.writeln("<br>" + telNum1 + " is telNum:" + pattern.test(telNum1));
15             pattern.lastIndex = 0;
16             document.writeln("<br>" + telNum2 + " is telNum:" + pattern.test(telNum2));
17         }
18 
19         function testIfIsPatternObjectIsGlobal() {
20             var p = /\w+@\w+\.com/g;
21             var mail = "zhangsan@amail.com";
22             document.writeln("<br>" + mail + " is mail?" + p.test(mail));
23             document.writeln("<br>lastIndex: " + p.lastIndex);
24             p = /^1\d{10}/g;
25             document.writeln("<br>lastIndex: " + p.lastIndex);
26             var telNum = "13088888888";
27             document.writeln("<br>" + telNum +" is telNum? " + p.test(telNum));            
28         }
29         testIfIsPatternObjectIsGlobal();
30         //testTelNum();
31         //testExecResultType();