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<!DOCTYPE html> <html> <head> <script src="/lib/jquery-1.12.2.min.js"></script> <script> $(document).ready(function(){ $("input").keydown(function(){ $("input").css("background-color", "yellow"); }); $("input").keyup(function(){ $("input").css("background-color", "pink"); }); }); </script> </head> <body> Enter your name: <input type="text"> <p>Enter your name in the input field above. It will change background color on keydown and keyup.</p> </body> </html>