JavaScript Array Push key value

You have to use bracket notation:

var obj = {};obj[a[i]] = 0;x.push(obj);

The result will be:

x = [{left: 0}, {top: 0}];

Maybe instead of an array of objects, you just want one object with two properties:

var x = {};

and

x[a[i]] = 0;

This will result in x = {left: 0, top: 0}.

javascript arrays push

You may use:

To create array of objects:

var source = ['left', 'top'];const result = source.map(arrValue => ({[arrValue]: 0}));

Demo:

Show code snippet

var source = ['left', 'top'];const result = source.map(value => ({[value]: 0}));console.log(result);