Changing CSS pseudo-element styles via JavaScript
4316
Selecting and manipulating CSS pseudo-elements such as ::before and ::after using javascript (or jQuery)
59998
Swap elements using CSS?
1933
How can I change an element's class with JavaScript?
116352
How can I make the browser see CSS and Javascript changes?
87337
How to change an input button image using CSS?
98283
What CSS properties can be applied to which HTML elements
103222
Can I change the height of an image in CSS :before/:after pseudo-elements?
112972
Are there any tools for merging CSS?
45124
How do I override default PrimeFaces CSS with custom styles?
47964
Setting background-image using jQuery CSS property
29955
How do I style a  dropdown with only CSS?
50311
Z-index with before pseudo-element
131426
How do you add CSS with Javascript?
108091
Dynamically change CSS of link based on current page
79549
Inline style to act as :hover in CSS
152944
CSS :after pseudo element not showing up on ?
41006
Change a HTML5 input's placeholder color with CSS