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
        const reg = /[abc]/;
        console.log(reg.test("ababab"));
        console.log(reg.test("abc"));
        console.log(reg.test("acbacb"));
        console.log(reg.test("acacac"));
        console.log(reg.test("dfdfdfd"));

        // 连字符 -
        const reg1 = /0-9/;//匹配数字
        const reg2 = /a-z/;//匹配小写英文字母
        const reg3 = /A-Z/;//匹配大写英文字母
        const reg4 = /a-zA-Z0-9_/; //匹配英文字母+数字+下划线

        // ^ 取反
        // const reg6 = /[^0-9]/;
        const reg6 = /\d/;
        console.log(reg6.test("aaa"));

        // . 除换行以外的任意字符
        const reg7 = /./;
        console.log(reg7.test("aaa"));
        console.log(reg7.test("1234567890"));
        console.log(reg7.test(""));// false
        console.log(reg7.test("\n"));
        console.log(reg7.test("\r"));
    </script>
</body>
</html>