In the comments, you can see the requirements for

the phone number validation.

Go ahead and pause this video,

see if you can complete this function before I show you my solution.

One quick reminder though, don't forget that parentheses are special characters.

So to indicate you want to match those literal characters,

you need to escape them with a backslash, like this or like that.

Here's how I broke down this problem.

I see three groups of numbers, two groups of three and one group of four.

So I'll type return.

And three groups.

And one group of four.

There are some characters that we want the user to type in though.

Parentheses around the first group.

So, \ (, and

\), a space, and -.

And we don't want any other characters at the beginning or end.

So I'll put a ^ and $ at either end.

And we'll test, and pass in telephone.

Save, and if I test this out in the browser,

We can see it works!

Asking a user to format a phone number is unnecessary though.

I'll show you how you can format the phone number automatically in a future video.

Next let's validate the email address.