Today in this blog, I'll share with you this program (Email Validation Check). At first, on the webpage, there are two containers. On the first container, I have entered an invalid email address so there is shown a tooltip with a warning message and with the red border. And, in the second container, I have entered a valid email address so there is shown the submit button and with the green border. As you know, red color indicates an error and green color indicates success.
You can download the source code files through the given link. Click here to download source code files.