Creating object property from a variable name

Question

given this example:

var obj = {
    'a': 1,
    'b': 2
};

will be a:1, b:2 as excected. But what if I have:

var b = 'myProperty';
var obj = {
    'a': 1,
    b: 2
};

I wanted to have a: 1, myProperty: 2 but I still got a: 1, b: 2! How to fix it?

Check the answers here: https://stackoverflow.com/questions/2241875/how-to-create-an-object-property-from-a-variable-value-in-javascript — Mohamed Ibrahim Elsayed, Mar 03 '18 at 20:05
Please use the search: [`[javascript] object literal variable`](https://stackoverflow.com/search?q=%5Bjavascript%5D+object+literal+variable) — Felix Kling, Mar 03 '18 at 20:05
Possible duplicate: https://stackoverflow.com/questions/1184123/is-it-possible-to-add-dynamically-named-properties-to-javascript-object — kingdaro, Mar 03 '18 at 20:06

score 1 · Answer 1 · answered Mar 03 '18 at 20:04

1

Variables in object property names are only allowed using the bracket notation:

var b = 'myProperty';

var obj = {
    'a': 1
};

obj[b] = 2;

console.log(obj.myProperty); // logs 2

answered Mar 03 '18 at 20:04

Mezo Istvan

score 1 · Answer 2 · answered Mar 03 '18 at 20:05

1

Hope this helps!

var b = 'myProperty';
var obj = {
    'a': 1
};
obj[b]=2;
console.log(obj)

answered Mar 03 '18 at 20:05

yajiv

2 Answers2