Sometimes, we want to insert hyphens into a JavaScript string.
In this article, we’ll look at how to insert hyphens into a JavaScript string.
How to insert hyphens into a JavaScript string?
To insert hyphens into a JavaScript string, we can use the JavaScript string’s replace method.
For instance, we write:
const phone = "1234567890";
const newPhone = phone.replace(/(\d{3})(\d{3})(\d+)/, '$1-$2-$3');
console.log(newPhone)
We call phone.replace with a regex that has 3 capturing groups for capturing 2 groups of 3 digits and the remaining digits respectively.
Then we put dashes in between each group with '$1-$2-$3'.
Therefore, newPhone is '123-456-7890'.
Conclusion
To insert hyphens into a JavaScript string, we can use the JavaScript string’s replace method.
