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How to count the number of lines of a string in JavaScript?

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Sometimes, we want to count the number of lines of a string in JavaScript.

In this article, we’ll look at how to count the number of lines of a string in JavaScript.

How to count the number of lines of a string in JavaScript?

To count the number of lines of a string in JavaScript, we can use the string split method.

For instance, we write

const lines = str.split(/\r\n|\r|\n/);

to call str.split with a regex that matches all line breaks in the str string to split the string by the new line characters.

It returns an array of split substrings so we can use the length property of the lines array to get the number of lines in str.

Conclusion

To count the number of lines of a string in JavaScript, we can use the string split method.

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