1、对象属性删除
<script> ???function fun(){ ???????this.name = ‘mm‘; ???} ???var obj = new fun(); ???console.log(obj.name);//mm ???delete obj.name; ???console.log(obj.name); //undefined</script>2、变量删除
<script> ???var name = ‘lily‘; ???delete name; ???console.log(name); //name is not defined</script>
3、对象原型设置的属性无法删除
<script> ???function Person() { ???} ???Person.prototype.say=‘hello‘; ???var p=new Person(); ???console.log(p.say);//hello ???delete p.say; ???console.log(p.say);//hello</script>JS——delete
原文地址：https://www.cnblogs.com/wuqiuxue/p/8342627.html