Opening and closing a block and writing to cookies?

Question

JavaScript

Help! There is a hidden menu and a block that opens the menu when clicked. How to make it so that if the menu is open, then it will also be open on other pages?

Answer 1

https://developer.mozilla.org/en/docs/Web/API/Docu...
https://developer.mozilla.org/en/docs/Web/API/Wind...
https://developer. mozilla.org/en-US/docs/Web/API/W...
Choose any repository, write a boolean (true\false) to it on click, and check it every time you run the code (on other pages).