How to create an array of objects in javascript?

Question

Imagine I have an object:

var abc = {
key1:'val1',
key2:'val2',
key3:'val3'
};

Now, I want to create multiple objects of the same structure and I want them in an array named xyz[ ] without creating it explicitly every time and pushing it into the array.

How to do that?

Answer 1

arr = [{key:value},{key:value}]
or
arr.push({key:value})

Answer 2

follow Lily Mea way

or

let arr = [];
arr = [...arr, {key:value}];