Arrays in Javascript allow us to group values and iterate over them, we can add and remove array elements in different ways. Instead of a delete method, the Javascript array has a variety of ways that allow you to clean array values with

Remove Elements from End of Javascript Array

Javascript Array Elements can be removed from the end of an array by setting the length Property to a value less than the Current Value. Any Element whose index greater or equal to the new Length will be removed

var array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
array.length = 4;

//array  = [1,2,3,4]

we can remove the last Element of an array using the pop() method . The pop Method modifies the array on which it is invoked

Remove Elements from Beginning of Javascript Array

How to remove the first Element of a Javascript Array ?

the Shift Method works like the pop method except it removes the first Element of a Javascript array instead of the Last.

For example :

var array = [1, 2, 3, 4];
array.shift();
//array = [2,3,4]