add item in javascript array first code example

Example 1: javascript append how first element

// 2018+ Version
parentElement.prepend(newFirstChild)

Example 2: javascript array add front

// example:
let yourArray = [2, 3, 4];
yourArray.unshift(1); // yourArray = [1, 2, 3, 4]

// syntax:
// <array-name>.unshift(<value-to-add>);