<html><head><script src="https://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script><script>$(document).ready(function(){ $("button").click(function(){ $("#p1").html("attr('checked'): " + $("input").attr('checked') + "<br>prop('checked'): " + $("input").prop('checked')); });});</script></head><body><p><b>Note:</b> Check and uncheck the checkbox and then click the button to refresh content.</p><button>Check value of attr() and prop()</button><br><br><input id="check1" type="checkbox" checked="checked"><label for="check1">Check me</label><p id="p1"></body></html>