I have a project in school and i want to add some login functions. know im planning to make an external js and there i will get the input of the user.In the login button i will put there the username input but how do i cancel the funtion if the users input is null and where should i put these method THANKS FOR THE FUTURE HELP :)

Question

RUSH RUSH RUSH!!

Answer 1

Just use an if to check if the input is not an empty string (if (input != "") {/*do stuff*/}).

Answer 2

in these website i will change the login(thats a link )by the user input and then if i click ther username it will call the link that ive a sign to login how do i change that?