lovecoding
/
Web1020


			
				
					
						
						
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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>
        const reg = /(ab)c/;
        console.log(reg.test("abcabdcba")); //false
        console.log(reg.test('ab')); // false
        // 2025-03-29
        const data = '2025-03-29';
        // 03/29/2025
        const reg1 = /^(\d{4})-(\d{2})-(\d{2})$/
        console.log(reg1.test(data));
        // $1 $2 $3
        // 分组捕获
        console.log(data.replace(reg1,'$2~$3~$1'))
        // 分支结构
        const a1 = 'www';
        const a2 = 'aaa';
        const a3 = 'vvv';
        const a4 = 'ggg';
        const reg2 = /www|ggg/;
        console.log(reg2.test(a1));
        console.log(reg2.test(a2));
        console.log(reg2.test(a3));
        console.log(reg2.test(a4));
    </script>
</body>
</html>