Sometimes, we want to define a regular expression to validate US phone numbers with JavaScript.
In this article, we’ll look at how to define a regular expression to validate US phone numbers with JavaScript.
How to define a regular expression to validate US phone numbers with JavaScript?
To define a regular expression to validate US phone numbers with JavaScript, we write a regex to match the groups of numbers.
For instance, we write
const re = /^\([0-9]{3}\)[0-9]{3}-[0-9]{4}$/;
to use [0-9]{3} to match the groups of 3 digits.
We use [0-9]{4} to match the group of 4 digits.
^ matches start of the string.
$ matches end of the string.
Conclusion
To define a regular expression to validate US phone numbers with JavaScript, we write a regex to match the groups of numbers.
