Set.prototype.add()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. Itâs been available across browsers since 2015å¹´7æ.
add() æå¨ä¸å Set ç©ä»¶ç尾端å ä¸ä¸åæå® value çæ°å
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å試ä¸ä¸
const set1 = new Set();
set1.add(42);
set1.add(42);
set1.add(13);
for (const item of set1) {
console.log(item);
// Expected output: 42
// Expected output: 13
}
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js
mySet.add(value);
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js
var mySet = new Set();
mySet.add(1);
mySet.add(5).add("some text"); // chainable
console.log(mySet);
// Set [1, 5, "some text"]
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| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-set.prototype.add |