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 â¨2015å¹´7æâ©.
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const map1 = new Map();
map1.set("bar", "foo");
console.log(map1.delete("bar"));
// Expected result: true
// True indicates successful removal
console.log(map1.has("bar"));
// Expected result: false
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js
mapInstance.delete(key)
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key-
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Map对象ä¸å é¤çå ç´ çé®ã
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ç´ åå¨å¹¶å·²è¢«ç§»é¤ï¼å为 trueï¼å¦æ该å
ç´ ä¸åå¨ï¼å为 falseã
示ä¾
ä½¿ç¨ delete()
js
const myMap = new Map();
myMap.set("bar", "foo");
console.log(myMap.delete("bar")); // è¿å trueãæåå°ç§»é¤å
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console.log(myMap.has("bar")); // è¿å falseã"bar" å
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| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-map.prototype.delete |