Add Element to Beginning of Array or UnShift Array using JavaScript.
You can use JavaScript array unshift method to add element to the beginning of the array.
let arr = [1,2,3,4,5];
let modified_array_len = arr.unshift(6);
console.log('Modified array is ', arr);
console.log('Modifed array len is ', modified_array_len);
// - "Modified array is ", [6, 1, 2, 3, 4, 5]
// - "Modifed array len is ", 6
unshift method moves elements to the right of the array after adding new elements to start of the array. You can also add multiple elements separated by comma.
let arr = [1,2,3,4,5];
arr.unshift(7,8,9);
console.log('Modified array is ', arr);
// "Modified array is ", [7, 8, 9, 1, 2, 3, 4, 5]