Electron

1. Let's say I created this CSS file called test.css:

body {
  opacity: 0.3;
}

2. Upload the new CSS file to the GitHub repository:
Screen Shot 2022-04-11 at 12 00 40 AM

3. To load the new CSS file onto the website, update your HTML file and add a <link rel="stylesheet" href="test.css"> inside the <head> section. Note: if you uploaded the CSS file into a folder in the previous step, the href attribute should use the correct file path (for example: href="folder_name/test.css").

4. Upload the updated HTML file to the GitHub repository.
Screen Shot 2022-04-11 at 12 00 40 AM

5. Wait a few minutes for GitHub to process. After that, your website should now be loading the new HTML file.