Change css var on Hover

Is possible to change the content of a css var when i hover it ? How i can do it ? I have a web page using react running in raspberry pi i want to change background color of the menu using this var but i don’t want to write the code again. Does anyone knows how i can update a css var value when i hover ?Thank’s

If I’m understanding your question correctly, you are looking for the :hover pseudo-class . It’s introduced in the challenge Adjust the Hover State of an Anchor Tag.

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You can just set a new value for the variable in the :hover selector (if I understood the question correctly).

:root {
  --bg-color: #03a9f4;

div {
  height: 200px;
  width: 200px;
  background: var(--bg-color)

div:hover {
  --bg-color: #9c27b0;

Not possible but the trick is to change the CSS Class of the variable on hover by using either JavaScript or jQuery.

Check this:

JavaScript example for it:

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Thank’s to all i solved it