WeakSet delete()
JavaScript WeakSet delete()方法
JavaScript WeakSet
delete()方法用于从
WeakSet 中删除指定的对象>对象。
语法
delete()方法由以下语法表示:
JavaScript WeakSet delete()方法示例
让我们看一个从WeakSet对象中删除指定元素的示例。
<script>
var ws = new WeakSet();
var obj={};
ws.add(obj);
document.writeln("Element present before invoking delete() method: "+ws.has(obj)+"<br>");
ws.delete(obj);
document.writeln("Element present before invoking delete() method: "+ws.has(obj));
</script>
输出:
Element present before invoking delete() method:true
Element present before invoking delete() method:false