lovecoding
/
VIP26


			
							1234567891011121314151617181920212223242526272829303132333435363738394041
							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // []
        // const reg = /[abc]/ //任意匹配abc
        // console.log(reg.test('abc'))
        // console.log(reg.test('abandon'))
        // console.log(reg.test('banana')) 
        // console.log(reg.test('car'))
        // console.log(reg.test('listen'))
        // console.log(reg.test('tomorrow'))

        // 连字符
        // const reg1 = /[a-z]/;//a-z的26个字母任意匹配
        // const reg2 = /[A-Z]/; //A-Z的26个字母任意匹配
        // const reg3 = /[0-9]/; //0-9的数字任意匹配
        // const reg4 = /[a-zA-Z0-9_]/

        // ^ 取反
        const reg1 = /[^0-9]/ 
        console.log(reg1.test("1111"))
        console.log(reg1.test("abc"))

        // . 除换行外的任意字符
        const reg = /./
        console.log(reg.test(''))//. 匹配空字符串是false 
        console.log(reg.test('abc'))
        console.log(reg.test('\n'))
        console.log(reg.test('\r'))
        console.log(reg.test('34567'))


    </script>
</body>
</html>