How to Empty an Array in JavaScript

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There are various ways to empty an Array in JavaScript.

The easiest one is to set its length to 0:

let strArray = ["A", "B", "C","D", "E"]; strArray.length = 0;

Another method mutates the original array reference, assigning an empty array to the original variable:

var intArray = [1,2,3,4,5,6,7] intArray = [];

Complete Example

var strArray = ["A", "B", "C","D", "E"]; var intArray = [1,2,3,4,5,6,7] function emptyArray(){ console.log(" Before empty an array : " + strArray); strArray.length = 0; console.log(" After empty an array : " + strArray); console.log(" Before empty an array : " + intArray); intArray = []; console.log(" After empty an array : " + intArray); } emptyArray();

Output:

Before empty an array : A,B,C,D,E After empty an array : Before empty an array : 1,2,3,4,5,6,7 After empty an array : 

For the best learning experience, I highly recommended that you open a console (which, in Chrome and Firefox, can be done by pressing Ctrl+Shift+I), navigate to the "console" tab, copy-and-paste each JavaScript code example from this guide, and run it by pressing the Enter/Return key.

You can refer below screenshot for your testing: