Baseline Widely available
set()
ã¡ã½ããã¯ãæå®ããããã¼ã¨å¤ããã¤æ°ããè¦ç´ ã WeakMap
ãªãã¸ã§ã¯ãã¸è¿½å ãã¾ãã
const weakmap1 = new WeakMap();
const object1 = {};
const object2 = {};
weakmap1.set(object1, "foo");
weakmap1.set(object2, "bar");
console.log(weakmap1.get(object1));
// Expected output: "foo"
console.log(weakmap1.get(object2));
// Expected output: "bar"
æ§æ 弿°
key
å¿
é ã§ãã object
ã§ããå¿
è¦ãããã¾ãã WeakMap
ãªãã¸ã§ã¯ãã«è¿½å ããè¦ç´ ã®ãã¼ã§ãã
value
å¿
é ã§ããä»»æã®å¤ã§ãã WeakMap
ãªãã¸ã§ã¯ãã«è¿½å ããè¦ç´ ã®å¤ã§ãã
WeakMap
ãªãã¸ã§ã¯ãã§ãã
var wm = new WeakMap();
var obj = {};
// Add new elements to the WeakMap
wm.set(obj, "foo").set(window, "bar"); // chainable
// Update an element in the WeakMap
wm.set(obj, "baz");
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