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@@ -0,0 +1,48 @@
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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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+ // let s1 = new Set();
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+ // s1.add(1);
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+ // s1.add("hello");
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+ // console.log(s1)
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+ // let s2 = new Set([1,2,3,4,5]);
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+ // s2.add(3);
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+ // s2.add(6);
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+ // console.log(s2);
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+
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+ // let arr = [1,2,3,4,5,6,3,4,5];
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+ // let s3 = new Set(arr);
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+ // console.log(s3);
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+ // console.log(Array.from(s3));
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+
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+
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+ // let s4 = new Set([1,2,3,4,5]);
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+ // s4.delete(3);
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+ // console.log(s4)
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+ // console.log(s4.has(5));
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+ // s4.clear();
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+ // console.log(s4);
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+
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+ // for(let val of s4.entries()){
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+ // console.log(val);
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+ // }
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+ // console.log(s4.size);
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+
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+ let obj = {
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+ b:2
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+ }
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+ let ws = new WeakSet();
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+ ws.add({a:1});
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+ ws.add(obj);
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+ // ws.add(1);
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+ ws.add(obj);
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+ console.log(ws)
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+ </script>
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+</body>
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+</html>
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