javaScript push item до начала массива
var colors = ["white","blue"];
colors.unshift("red"); //add red to beginning of colors
// colors = ["red","white","blue"]
Grepper
var colors = ["white","blue"];
colors.unshift("red"); //add red to beginning of colors
// colors = ["red","white","blue"]let arr = [4, 5, 6]
arr.unshift(1, 2, 3)
console.log(arr);
// [1, 2, 3, 4, 5, 6]
// Use unshift method if you don't mind mutating issue
// If you want to avoid mutating issue
const array = [3, 2, 1]
const newFirstElement = 4
const newArray = [newFirstElement].concat(array) // [ 4, 3, 2, 1 ]
console.log(newArray);