Getting the object's property name

Question

i is the name.

for(var name in obj) {
    alert(name);
    var value = obj[name];
    alert(value);
}

So you could do:

seperateObj[i] = myObject[i];

Use Object.keys():

var myObject = { a: 'c', b: 'a', c: 'b' };
var keyNames = Object.keys(myObject);
console.log(keyNames); // Outputs ["a","b","c"]

Object.keys() gives you an array of property names belonging to the input object.

Disclaimer I misunderstood the question to be: "Can I know the property name that an object was attached to", but chose to leave the answer since some people may end up here while searching for that.

---

No, an object could be attached to multiple properties, so it has no way of knowing its name.

var obj = {a:1};
var a = {x: obj, y: obj}

What would obj's name be?

Are you sure you don't just want the property name from the for loop?

for (var propName in obj) {
  console.log("Iterating through prop with name", propName, " its value is ", obj[propName])
}

you can easily iterate in objects

eg: if the object is var a = {a:'apple', b:'ball', c:'cat', d:'doll', e:'elephant'};

Object.keys(a).forEach(key => {
   console.log(key) // returns the keys in an object
   console.log(a[key])  // returns the appropriate value 
})

for direct access a object property by position... generally usefull for property [0]... so it holds info about the further... or in node.js 'require.cache[0]' for the first loaded external module, etc. etc.

Object.keys( myObject )[ 0 ]
Object.keys( myObject )[ 1 ]
...
Object.keys( myObject )[ n ]

Other than "Object.keys( obj )", we have very simple "for...in" loop - which loops over enumerable property names of an object.

const obj = {"fName":"John","lName":"Doe"};

for (const key in obj) {
    //This will give key
      console.log(key);
    //This will give value
    console.log(obj[key]);
    
}