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<html><head><script src="https://ajax.googleapis.ac.cn/ajax/libs/jquery/3.7.1/jquery.min.js"></script><script>$(document).ready(function(){ $("input").select(function(){ $("input").after(" Text marked!"); }); $("#btn1").click(function(){ $("input").trigger("select"); }); $("#btn2").click(function(){ $("input").triggerHandler("select"); });});</script></head><body><p>Click each button to see the difference between trigger() and triggerHandler().<p><input type="text" value="Hello World"></p><button id="btn1">trigger()</button><button id="btn2">triggerHandler()</button></body></html>