JSFiddle - React, Tailwind, and code Playground
JavaScript
let old1 = [0, 0, 0, 0]
let new1 = [0, 0, 0, 0]
old1=new1;
old1[0]++;
console.log(old1)
console.log(new1)
let old1 = [0, 0, 0, 0]
let new1 = [0, 0, 0, 0]
old1=new1;
old1[0]++;
console.log(old1)
console.log(new1)