How to Empty an Array in JavaScript

There are many ways, but to give you two ways, Suppose you have array A.

A = []; There's a way to do that. This means that you assign a new empty array to A. If it is not necessary to refer to the existing array A, It's the best way.

var arr1 = ['a','b','c','d','e','f'];
Assign a reference of var arr2 = arr1; // arr1 to arr2 
arr1 = [];
console.log(arr2); // Output ['a','b','c','d','e','f']

You can write it like this.

The second method is A.splice(0,A.length); That's how you do it. A.length represents the length of A, and splice is the method of erasing the element by the size of the first parameter to the second parameter.