Append JSON data to existing array of objects in Node.js [duplicate]

Question

Consider I have an array

let array1 = [{a:1, b:2}, {e:5,f:6}]
let json1 = {c:3, d:4}

I want to append json1 to first item of array1 so the resultant looks like

array1 = [{a:1, b:2, c:3, d:4}, {e:5, f:6}]

I am sure push doesn't work here. I am not sure how to proceed further.

Answer 1

You can use spread operator

let array1 = [{a:1, b:2}, {e:5,f:6}];
let json1 = {c:3, d:4};
array1[0] = {...array1[0], ...json1};
console.log(array1);