javaweb/javascript/js_regexp/js_regexp.html at master · CPU-Code/javaweb · GitHub

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<!--
 * @由于个人水平有限, 难免有些错误, 还请指点:
 * @Author: cpu_code
 * @Date: 2020-10-15 19:55:50
 * @LastEditTime: 2020-10-18 11:42:22
 * @FilePath: \web\javascript\js_regexp\js_regexp.html
 * @Gitee: [https://gitee.com/cpu_code](https://gitee.com/cpu_code)
 * @Github: [https://github.com/CPU-Code](https://github.com/CPU-Code)
 * @CSDN: [https://blog.csdn.net/qq_44226094](https://blog.csdn.net/qq_44226094)
 * @Gitbook: [https://923992029.gitbook.io/cpucode/](https://923992029.gitbook.io/cpucode/)
-->
<!DOCTYPE html>
<html lang="ch">
<head>
    <meta charset="UTF-8">
    <title>RegExp对象</title>
    <script >

        /*

           2. 正则对象：
                1. 创建
                    1. var reg = new RegExp("正则表达式");
                    2. var reg = /正则表达式/;
                2. 方法
                    1. test(参数):验证指定的字符串是否符合正则定义的规范
         */

        //1.
        var reg = new RegExp("^\\w{6,12}$");
        //2.
        var reg2= /^\w{6,12}$/;

        document.write(reg + "<br>");
        document.write(reg2 + "<br>");

        var username = "cpucode";

        //验证
        var flag = reg.test(username);
        document.write(flag + "<br>");

        var flag2 = reg2.test(username);
        document.write(flag2);
    </script>
</head>
<body>

</body>
</html>