push multiple arrays into one code example

Example 1: javascript array concat spread operator

const arr1 = [1,2,3]
const arr2 = [4,5,6]
const arr3 = [...arr1, ...arr2] //arr3 ==> [1,2,3,4,5,6]

Example 2: js push multiple arguments

var a = [];
a.push(1, 2, 3);
console.log(a);