Is there a universal JS solution for normal CSS rendering in ie8?

Question

css

I actually made a website and was happy until I looked it up in IE8 on a laptop with Win7.
Especially, it is depressing that many still have win7 with IE8 not updated.
To redo the entire layout for IE8 is honestly too lazy ...
What should I do?
Is there a universal pluggable JS solution for displaying CSS properly in ie8?
And what do you generally do in such cases?
Is it possible to include different css files depending on the browser used without using PHP code?

Answer 1

And what do you generally do in such cases?

I create an ie8.less file and start to provide cross-browser compatibility. Moreover, this file is created at the very beginning, and after the completion of a large element in modern browsers (grid, catalog, etc.), it is supplemented and updated.
There is no universal solution in JS.
But there is a universal solution for css2 and progressive enhancement (in your case, graceful degradation).

Answer 2

No.

Answer 3

Made up a block - tested it in all browsers.
Made up the page - tested it in all browsers.
I made the first page responsive - I tested it on devices.
Such a scheme allows you to immediately catch and fix a bug, in comparison with your case, when the project is ready, but there are a lot of bugs and it is not clear what is coming from and why.
For IE9, you can create a separate css file, include it in the section, but as a rule, these are crutches, and therefore not very acceptable.
Make a stub for IE9 with a link to download Chrome or Firefox.