lovecoding
/
web0715


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536
							<!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>
        // 分组 （）
        const  reg = /(ab){2}/;
        console.log(reg.test("ababababab"));
        console.log(reg.test("aaaabb"));
        
        // 分组捕获
        // 2024-12-07
        const reg1 = /^(\d{4})-(\d{2})-(\d{2})/;
        // console.log(reg1.test("2024-12-07"))
        // 07/12/2024
        // $1 $2 $3
        const str = '2024-12-07';
        console.log(str.replace(reg1,'$3-$2-$1'))
        
        // 分支结构
        const reg3 = /西游记|红楼梦/;
        const str1 = '西游记';
        const str2 = '水浒传';
        const str3 = '红楼梦';
        const str4 = '三国演义';
        console.log(reg3.test(str1))
        console.log(reg3.test(str2))
        console.log(reg3.test(str3))
        console.log(reg3.test(str4))
    </script>
</body>
</html>