js add element first in array code example

Example 1: javascript append how first element

// 2018+ Version
parentElement.prepend(newFirstChild)

Example 2: js add element to front of array

//Add element to front of array
var numbers = ["2", "3", "4", "5"];
numbers.unshift("1");
//Result - numbers: ["1", "2", "3", "4", "5"]