set.delete
delete()
方法可以从一个Set
对象中删除指定的元素。
语法
mySet.delete(value);
参数
value
将要删除的元素
返回值
成功删除返回true
,否则返回false。
示例
使用 delete
方法
var mySet = new Set();
mySet.add('foo');
mySet.delete('bar'); // Returns false. No "bar" element found to be deleted.
mySet.delete('foo'); // Returns true. Successfully removed.
mySet.has('foo'); // Returns false. The "foo" element is no longer present.
让我们来看看如何从一个集合中删除一个对象。
var setObj = new Set(); // Create a New Set.
setObj.add({x: 10, y: 20}); // Add object in the set.
setObj.add({x: 20, y: 30}); // Add object in the set.
// Delete any point with `x > 10`.
setObj.forEach(function(point){
if(point.x > 10){
setObj.delete(point)
}
})
规范
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'Set.prototype.delete' in that specification. | Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262)The definition of 'Set.prototype.delete' in that specification. | Draft | ? |
浏览器兼容性
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 38 | (Yes) | 13.0 (13.0) | 11 | 25 | 7.1 |
Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support | No support | 38 | (Yes) | 13.0 (13.0) | No support | No support | 8 |
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