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

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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.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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