How to update the user's cache?

Question

Web development

After editing the styles to "clear the cache" for the user, I change the name of the css file. For example, there was - style after editing style_2 and uploading it to the hosting.

There are three questions:

1) Is there an alternative without regular renaming after editing?

2) If new entities have been added to HTML, can the name of the css file be left unchanged? That is, the browser must apply for new styles for new objects.

3) And I understand correctly that with the 3rd edition (after - style_1 , style_2) you can return to the file name simply - style?