WeakMap.prototype.delete()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. Itâs been available across browsers since 2015ë 7ì.
delete() ë©ìëë WeakMap ê°ì²´ìì í¹ì ìì를 ì ê±°í©ëë¤.
ìëí´ ë³´ê¸°
const weakmap1 = new WeakMap();
const object1 = {};
weakmap1.set(object1, 42);
console.log(weakmap1.delete(object1));
// Expected output: true
console.log(weakmap1.has(object1));
// Expected output: false
구문
js
delete key;
매ê°ë³ì
key-
WeakMapê°ì²´ìì ì ê±°í ììì í¤ì ëë¤.
ë°í ê°
WeakMap ê²ì²´ì ììê° ì±ê³µì ì¼ë¡ ì ê±°ë ê²½ì° trueì
ëë¤. WeakMapìì í¤ë¥¼ ì°¾ì ì ìê±°ë í¤ê° ê°ì²´ê° ìë ê²½ì°ë falseì
ëë¤.
ìì
delete() ë©ìë ì¬ì©í기
js
const wm = new WeakMap();
wm.set(window, "foo");
wm.delete(window); // true ë°í. ì±ê³µì ì¼ë¡ ì ê±°ë¨.
wm.has(window); // false ë°í. window ê°ì²´ë ëì´ì WeakMapì ìì§ìì.
ëª ì¸
| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-weakmap.prototype.delete |