Question Changes in JavaScript File Automatically Disappearing!

[ichimocu]

Dear friends, I've been making some changes to the JavaScript file on my website, adding functionalities. However, after approximately a month, these modifications seem to vanish, causing certain functionalities on my site to stop working properly. How can I prevent this issue from happening?

 

[ichimocu]

Additionally, changes I make in the CSS and index.html files also disappear after a certain period.