Map.prototype.delete()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. Itâs been available across browsers since 2015å¹´7æ.
delete() 㯠Map ã¤ã³ã¹ã¿ã³ã¹ã®ã¡ã½ããã§ããã®ããããããã¼ãæå®ãã¦ç¹å®ã®è¦ç´ ãåé¤ãã¾ãã
試ãã¦ã¿ã¾ããã
const map = new Map();
map.set("bar", "foo");
console.log(map.delete("bar"));
// äºæ³ãããçµæ: true
// true ã¯æ£ããåé¤ããããã¨ã示ã
console.log(map.has("bar"));
// äºæ³ãããçµæ: false
æ§æ
js
mapInstance.delete(key)
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key-
Mapãªãã¸ã§ã¯ãããåé¤ããè¦ç´ ã®ãã¼ã§ãã
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Map ãªãã¸ã§ã¯ãã®è¦ç´ ãåé¤ãããã true ããè¦ç´ ãåå¨ããªããã° false ãè¿ãã¾ãã
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delete() ã¡ã½ããã®ä½¿ç¨
js
const myMap = new Map();
myMap.set("bar", "foo");
console.log(myMap.delete("bar")); // true ãè¿ããæ£å¸¸ã«åé¤ãããã
console.log(myMap.has("bar")); // false ãè¿ãã "bar" ã®è¦ç´ ãããåå¨ããªãã
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| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-map.prototype.delete |