Filters don't work.

Question

I've just finished css and when I tried to use the sololearn codes to see the effects of the filters it did not work ,So why and how can I fix this problem?

Answer 1

Did you link your CSS file with HTML file?

Answer 2

No, but I mean that in the last module and when I write any code the code works but the filters don't

Answer 3

You can run it in an html
In side the
<style>
Place the css code here
</style>
Or
Link it inside the html

Answer 4

it only has support from modern browsers