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@@ -0,0 +1,50 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+
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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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+
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+<body>
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+ <script>
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+ // [] 任意匹配
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+ // const reg = /[abc]/;
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+ // console.log(reg.test("ababab"))
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+ // console.log(reg.test("abc"))
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+ // console.log(reg.test("acacac"))
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+ // console.log(reg.test("acbbca"))
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+ // console.log(reg.test("dds"))
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+
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+ // - 连字符
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+ // const reg1 = /0-9/;
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+ // const reg2 = /a-z/;
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+ // const reg3 = /A-Z/;
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+ // const reg4 = /a-zA-Z0-9_/;
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+
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+
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+ /**
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+ *
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+ * \w => /a-zA-Z0-9_/
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+ * \d => /0-9/
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+ * \W => /[^a-zA-Z0-9_]/
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+ * \D => /[^0-9]/
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+ */
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+
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+ // 取反
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+ // const reg = /\D/;
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+ // console.log(reg.test('212'))
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+
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+ // . 匹配换行外的任意字符
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+ const reg = /./;
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+ console.log(reg.test("aaa"))
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+ console.log(reg.test("1234567897654"))
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+ console.log(reg.test("")) // false
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+ console.log(reg.test("\n"))
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+ console.log(reg.test("\r"))
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+ console.log(reg.test("\f"))
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+ </script>
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+</body>
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+
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+</html>
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zheng