How to get key "employee "
{ employee":{"name":"John","age":12}
}
It's not about Angular, this is plain Javascript:
const obj = { employee:{name:"John",age:12}}
const key = Object.keys(obj)[0]
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}}