目錄
1.遍歷對象屬性
①for (var key in obj){}
遍歷對象的可枚舉屬性,包括自有屬性、繼承自原型的屬性(不管是值還是函數);
②Object.keys(obj)
遍歷對象的自有屬性,且是可枚舉的,不包括繼承的;
③obj.has
遍歷對象的自有屬性,不管是枚舉的還是非枚舉的,都可以,不包括繼承的;
// An highlighted block
let obj={"name":"aiden","age":25};
Object.defineProperty(obj,"sex",{value:"25",enumerable:false});
Object.prototype.property1=function(){console.log("name is aiden")};
Object.prototype.property2=3;
for (var key in obj){
console.log(key)
}
//輸出name,age,property1,property2
var result1=Object.keys(obj)
//輸出name,age
var result2=Object.getOwnPropertyNames(obj)
//輸出name,age,sex