Answers for "javascript add first element in an array"

javascript append how first element

// 2018+ Version
parentElement.prepend(newFirstChild)

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>);

How can I add new array elements at the beginning of an array in JavaScript?

var arr = [23, 45, 12, 67];
arr = [34, ...arr]; // RESULT : [34,23, 45, 12, 67]

console.log(arr)