Sometimes, we want to extract the number part of a string with JavaScript.

In this article, we’ll look at how to extract the number part of a string with JavaScript.

How to extract the number part of a string with JavaScript?

To extract numbers from a string with JavaScript, we can use the JavaScript string’s replace method.

For instance, we write:

const str = 'foo123bar456'
const number = str.replace(/D/g, '');
console.log(number)

to call str.replace with a regex that matches all non-digit characters and replace them with empty strings.

Therefore, number is '123456'.

Conclusion

To extract numbers from a string with JavaScript, we can use the JavaScript string’s replace method.