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Set.prototype.clear()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
clear() 方法會從一個Set 物件中移除其所有元素。
嘗試一下
const set1 = new Set();set1.add(1);set1.add("foo");console.log(set1.size);// Expected output: 2set1.clear();console.log(set1.size);// Expected output: 0語法
js
mySet.clear();回傳值
範例
使用clear 方法
js
var mySet = new Set();mySet.add(1);mySet.add("foo");mySet.size; // 2mySet.has("foo"); // truemySet.clear();mySet.size; // 0mySet.has("bar"); // false規範
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-set.prototype.clear |