Map.prototype.delete()

¥Syntax

mapInstance.delete(key)

¥Parameters

key

要从 Map 对象中删除的元素的键。

¥Return value

如果 Map 对象中的某个元素存在并已被删除，则返回 true；如果该元素不存在，则返回 false。

¥true if an element in the Map object existed and has been removed, or false if the element does not exist.

¥Examples

¥Using delete()

const myMap = new Map();
myMap.set("bar", "foo");

console.log(myMap.delete("bar")); // Returns true. Successfully removed.
console.log(myMap.has("bar")); // Returns false. The "bar" element is no longer present.

¥See also

• Map