Trying to return a valid email from a function

Question

I'm writing a JS function that prompts the user to enter an email address. I want to confirm that the user input is an email address by checking if an '@' sign exists within the input. Then I want to return the email address if it's true.

My python knowledge has me writing this line, "if at == true return email", but the console is returning a syntax error. Any ideas? Code below:

function email_of_user() {
        var email = prompt("What is your email?");
        var at = email.indexOf("@");
            if at === true return email
      }

PS. This is code is within an HTML doc, rather than a standalone JS file.

Does this answer your question? [How to validate an email address in JavaScript](https://stackoverflow.com/questions/46155/how-to-validate-an-email-address-in-javascript) — Tristan, Dec 03 '19 at 23:58
Does this answer your question? [How to validate an email address in JavaScript](https://stackoverflow.com/questions/46155/how-to-validate-an-email-address-in-javascript) — Triby, Dec 04 '19 at 00:01
Not in particular, all I want is for the function to check if "@"exists within the prompted input, and if it does, return that email. I have literally started JavaScript 2 days ago so my question is meant to be naive. — nick_rinaldi, Dec 04 '19 at 00:03

score 1 · Answer 1 · answered Dec 04 '19 at 00:03

1

To check if the email contains the '@' symbol you just need to be sure at is not -1

So that function might look something like:

function email_of_user() {
    var email = prompt("What is your email?");
    var at = email.indexOf("@");
    if (at !== -1) { return email };
}

Careful, this could still return invalid emails. As someone commented, you might want to use regex like in this similar post

answered Dec 04 '19 at 00:03

Thomas Slater

11
1

Thank you, this is the answer I was hoping for. I won't make a habit of doing it like this, in the future when developing I will make sure to use regex for any professional endeavor. This is just a test. – nick_rinaldi Dec 04 '19 at 00:06

score 1 · Answer 2 · answered Dec 04 '19 at 10:56

1

The line of

if at === true return email

is incorrect, because you need to enclose the condition of the if into paranthesis, like

if (at === true) return email

answered Dec 04 '19 at 10:56

Lajos Arpad

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Trying to return a valid email from a function

2 Answers2