Removing the last n characters of a string in JavaScript

In this tutorial, we are going to learn about how to remove the last n characters of a string in JavaScript.

Consider, we have the following string:

const car = "volkswagen";

Now, we want to remove the last 3 characters gen from the above string.

Removing the last n characters

To remove the last n characters of a string in JavaScript, we can use the built-in slice() method by passing the 0, -n as an arguments.

0 is the start index.

-n is the number of characters we need to remove from the end of a string.

Here is an example, that removes the last 3 characters from the following string.

const car = "volkswagen";

const mod = car.slice(0, -3); // removes last 3 characters

console.log(mod);

Output:

"volkswa"

Similarly, we can also use the substring() method to remove the last n characters of a string.

const car = "volkswagen";

const mod = car.substring(0, car.length-3);

console.log(mod); // "volkswa"

In the above code, we have passed two arguments to the substring() method, the first one is start index 0 and second one is the end index (which is not included in the final output).

Note: The slice() and substring() methods does not modify the original string.