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@@ -0,0 +1,42 @@
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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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+ <!-- 正则表达式
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+ const 名称 = /需要校验的规则/
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+ 修饰符:
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+ g 匹配全局
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+ i 不区分大小写
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+ -->
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+ <script>
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+ const reg = /aa/gi;
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+ const str = 'AA,四大名著有aa,我也爱看Aa'
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+ console.log(reg.test('xxxxxx'));
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+ console.log(reg.exec(str));
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+ console.log(str.match(reg))
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+ const res = str.replace(reg, '红楼梦');
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+ console.log(res);
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+
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+ /**
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+ * js数据类型
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+ * 基本:string boolean number undefined null symbol bigInt
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+ * 引用:Object(对象 数组 函数)
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+ * 怎么去判断数据类型
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+ * typeof
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+ * instanceof
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+ * Object.prototype.toString.call()
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+ * constructor
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+ * 盒模型
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+ * 数组的方法 那些会改变原数组 那些不会改变原数组
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+ * for in / for of
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+ * /
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+ </script>
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+</body>
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+
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+</html>
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