wuheng
/
vip21-javaweb


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

    <script>
        const str = "1336661357"
        const tel = /[0-9]{11}/
        var b = tel.test( tel );
        //console.log( b )

        /**
         * . 匹配所有
         * * 零位或者多为
         * + 一次以上
         * [] 范围匹配
         * () 子匹配
         * ^ 以某某开头
         * $ 以某某结尾
         * ? 可有可没有 懒汉模式
         * {} 匹配次数
         */

        const strEmail = "admin@80boys.com"
        const email = /\w{3,20}@\w{3,20}\.\w{3,20}/
        console.log( email.test( strEmail ) )

        const emailreg = new RegExp("\\w{3,20}@\\w{3,20}\\.\\w{3,20}")
        console.log( emailreg.test( strEmail ) )

    </script>

</body>
</html>