// Add to the end of array
let colors = ["white","blue"];
colors.push("red");
// ['white','blue','red']
// Add to the beggining of array
let colors = ["white","blue"];
colors.unshift("red");
// ['red','white','blue']
// Adding with spread operator
let colors = ["white","blue"];
colors = [...colors, "red"];
// ['white','blue','red']