JavaScript "Make a Invalid Alert"

Question

I want to make a Invalid alert for mails.

Detals:
Text: It seems to be mistyped try again.

Using: JavaScript & CSS

Answer 1

https://www.w3schools.com/tags/att_input_type_email.asp
https://udn.realityripple.com/docs/Web/API/HTMLInputElement/invalid_event
https://www.w3schools.com/jsref/event_oninvalid.asp

Answer 2

I'm so lucky all mentors answer my quest! Thanks Chris Coder & AJ!