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<html><head><script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script><script>$(document).ready(function(){ $("input").keydown(function(){ $("input").css("background-color", "lightblue"); }); $("input").keyup(function(){ $("input").css("background-color", "lavender"); }); $("#btn1").click(function(){ $("input").keydown(); }); $("#btn2").click(function(){ $("input").keyup(); }); });</script></head><body><input type="text"><p><button id="btn1">Trigger keydown event for input field</button></p><p><button id="btn2">Trigger keyup event for input field</button></p></body></html>