LessonAbout 5 minLesson languageEnglishதமிழ் (Tamil)हिन्दी (Hindi)മലയാളം (Malayalam)తెలుగు (Telugu)ಕನ್ನಡ (Kannada)বাংলা (Bengali)मराठी (Marathi)ગુજરાતી (Gujarati)ਪੰਜਾਬੀ (Punjabi)Chapter 2 · Lesson 4 of 504. Hover: react to the mouseAdd :hover to a selector to style an element only while the mouse is over it. Make a button change colour when you point at it.