lovecoding
/
VIP32


			
				
					
						
						
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							<!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>
        // [] 任意匹配
        var reg = /[abc]/;
        console.log(reg.test("abc"));
        console.log(reg.test("acd"));
        console.log(reg.test("aiu"));
        console.log(reg.test("cud"));
        console.log(reg.test("bhd"));
        console.log(reg.test("uul"));
        // - 连字符
        const reg1 = /a-z/;//匹配小写26个字母
        const reg2 = /A-Z/;//匹配大写26个字母
        const reg3 = /0-9/;//匹配数字
        const reg4 = /a-zA-Z0-9_/;//匹配密码：英文+数字+_
        // ^ 取反 不在范围内
        const reg5 = /[^0-9]/;
        console.log(reg5.test('0909'));
        console.log(reg5.test('aaa'));
        // . 除换行符外的任意字符
        // 换行符 \n \r
        const reg6 = /./;
        console.log(reg6.test("aaa"));
        console.log(reg6.test(""));// 空字符串是false
        console.log(reg6.test("1124"));
        console.log(reg6.test("\n"));
        console.log(reg6.test("??"));
        console.log(reg6.test("\r"));
    </script>
</body>
</html>