add elements into array javascript code example

Example 1: javascript insert item into array

var colors=["red","blue"];
var index=1;

//insert "white" at index 1
colors.splice(index, 0, "white");   //colors =  ["red", "white", "blue"]

Example 2: js add item to array

const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.push("Kiwi");