如何从角度的json中获取密钥

Question

How to get key "employee "

{ employee":{"name":"John","age":12}

}

Answer 1

It's not about Angular, this is plain Javascript:

const obj = { employee:{name:"John",age:12}}

const key = Object.keys(obj)[0]

Answer 2

You can use forEach to get your output if you use Array Object

 function example1(array){ let res = []; array = [{"ex1":{"name":"John1","age":12}}, {"ex2":{"name":"John2","age":12}}, {"ex3":{"name":"John3","age":12}}] array.forEach((e, idx) => { res.push(Object.keys(e)) }) document.getElementById("ex1").innerHTML = JSON.stringify(res); }

 <input type="button" value="example1" onclick="example1()"> <p id="ex1"></p>

if you just use only object you can use For...in to get your output

 function example2(array){ let res = []; obj = {"ex1":{"name":"John1","age":12}, "ex2":{"name":"John2","age":12}, "ex3":{"name":"John3","age":12}} for(var val in obj){ res.push(val) } document.getElementById("ex2").innerHTML = JSON.stringify(res); }

 <input type="button" value="example2" onclick="example2()"> <p id="ex2"></p>

But remember when you put object or array or whatever check its valid or not. In your object is invalid here is the correct format

{"employee":{"name":"John","age":12}}