<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>set实现数组去重</title>
</head>
<body>
</body>
<script type="text/javascript">
let set = new Set(["a",'b',"c",'c'])
console.log(set.size) //3
let _arr = [...set];
console.log(_arr)
</script>
</html>
运行结果:
