Need help for my project

Question

Idk people would understand my question and if u understand please make this as short so here's my question :
I need help
I created index.html , style.css , main.js and in html file , i added login screen ( opening screen to display and it asks for name , pin and and submit button ) and then I make three operation screens like ( transaction , access control , loan ) but this operation screen display style was none by default and I add event listener as "click" to display operation screen to display as block.So now I created a database in MySQL and PHP code for particular login and i save it as "login.php" and it runs fine but how can I display the operation screen if the user name and pin was correct? Should I breakdown this entire html into parts like transaction , login ? Or is there any ways ?
Sorry for my English

Answer 1

Have you looked up some ways to do it? I think some other people here on the forum have asked similar questions, perhaps the answer is there:

https://www.sololearn.com/discuss/1318368/?ref=app
https://www.sololearn.com/discuss/860882/?ref=app

Answer 2

I didn't really understand the question well