TYPESCRIPT

Get last item from array ts

const arr: string[] = ['a', 'b', 'c'];

V1
const last = arr.at(-1);
console.log(last); // -> "c"

V2
const last = arr[arr.length - 1];
console.log(last); // -> "c"

V3
If you don't need the array afterwards, you could use  
const last = arr.pop()
console.log(last); // > "c"

V4
const last = arr.slice(-1)[0]
console.log(last); // -> "c"

how to get last element of array in typescript

var items: String[] = ["tom", "jeff", "sam"];

alert(items[items.length-1])

js get last n elements of array

const cars = ["benz", "bmw", "volvo", "skoda"];

const lastThree = cars.slice(-3);

console.log(lastThree); // ["bmw", "volvo", "skoda"]