add element to existing array of objects in javascript code example

Example 1: how to add objects in array

var a=[], b={};
a.push(b);    
// a[0] === b;

Example 2: add object to array javascript

let obj = { name: 'Bob' };
let arr = [{ name: 'John' }];

// add obj to array
arr = [...arr, obj];

console.log(arr) // [{ name: 'Bob' }, { name: 'John' }];