@BOYUAN-SHI Welcome
I have done some designs using my iPad, which was a little cramped for viewing. Technically, everything worked fine.
If you are working with a project with multiple files then probably a PC would be better. You can drag and drop the whole folder to the website. And change any file.
I think most people use a favorite editor to make changes, and drag and drop the file to the website. That works really well.