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@@ -0,0 +1,33 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+</head>
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+<body>
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+ <script>
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+ // 分组
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+ const reg = /(ab)(cd)/;
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+ console.log(reg.test('abaabbbdc'));
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+ console.log(reg.test('abab'));
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+ // 分组捕获 $1 $2 $3
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+ // 2024-04-17
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+ const data = '2024-04-17'
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+ const reg1 = /^(\d{4})-(\d{2})-(\d{2})$/
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+ console.log(reg1.test(data))
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+ // 04/17/2024
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+ console.log(data.replace(reg1,'$2~$3~$1'))
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+ // 分支结构
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+ const a1 = '西游记';
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+ const a2 = '水浒传';
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+ const a3 = '红楼梦';
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+ const a4 = '三国演义';
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+ const reg2 = /西游记|红楼梦/;
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+ console.log(reg2.test(a1));
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+ console.log(reg2.test(a2));
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+ console.log(reg2.test(a3));
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+ console.log(reg2.test(a4));
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+ </script>
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+</body>
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+</html>
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