JSFiddle - React, Tailwind, and code Playground
JavaScript
const length = 3;
const filledArray = Array(length).fill({ value: 0 });
console.log(filledArray); // [{ value: 0 }, { value: 0 }, { value: 0 }]
filledArray[1].value = 3;
console.log(filledArray); // [{ value: 3 }, { value: 3 }, { value: 3 }]