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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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+ /**
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+ * Map 键值对集合
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+ */
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+ const m = new Map([
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+ ["name","Lucy"],
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+ ["age","10"],
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+ ["address","哈尔滨"]
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+ ]);
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+ console.log(m);
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+ m.set("sex","女");
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+ m.delete("address")
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+ // m.clear()
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+ console.log(m.size);
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+ console.log(m.get("name"))
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+ console.log(m.has("age"))
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+ console.log(m.entries);
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+ console.log(m.keys);
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+ console.log(m.values);
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+ // console.log([...m])
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+ const arr = [['name','aaa']];
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+ console.log(new Map(arr))
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+ </script>
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+</body>
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+</html>
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zheng