This pure CSS snippet allows you to fade the irrelevant words in a paragraph when you hover over it, thus highlighting the important words in the section. It was designed by Bas Groothedde
If you are having trouble with the pen, try the archived copy on GitHub
Fade Irrelevant Words Snippet
See the Pen Highlight keywords of text on hover by Bas Groothedde (@ImagineProgramming) on CodePen.0