Map.prototype.delete()

 delete()删除Map实例key指定的值。

Syntax 语法

myMap.delete(key);

Parameters 参数

key

Required. The key of the element to remove from the Map object.

Return value

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

Examples

Using the delete method

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

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

Specifications

Browser compatibility

See also

• Map