Sometimes, we want to check whether a JavaScript string contains a line break.

In this article, we’ll look at how to check whether a JavaScript string contains a line break.

How to check whether a JavaScript string contains a line break?

To check whether a JavaScript string contains a line break, we can use the JavaScript regex’s exec method.

For instance, we write:

const text = "abcn123"
const match = /r|n/.exec(text);
console.log(match)

We call /r|n/.exec with text to return the matches of newline characters in text.

As a result, we get ['n', index: 3, input: 'abcn123', groups: undefined]

Conclusion

To check whether a JavaScript string contains a line break, we can use the JavaScript regex’s exec method.