js delete 用法(删除对象属性及变量)
摘要：1,对象属性删除functionfun(){this.name='mm';}varobj=newfun();console.log(obj....
1,对象属性删除
function fun(){ this.name = 'mm'; } var obj = new fun(); console.log(obj.name);//mm delete obj.name; console.log(obj.name); //undefined
2,变量删除
var name = 'lily'; delete name; console.log(name); //lily
直接用delelte删除不了变量
3,删除不了原型链中的变量
fun.prototype.age = 18; delete obj.age; console.log(obj.age) //18
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