To change the font family and font size with jQuery, use the jQuery css() method. The css property font-family and font-size is used. You can try to run the following code to learn how to change font family and font size with jQuery −ExampleLive Demo $(document).ready(function() {    $("p").on({      mouseenter: function() {         $(this).css({"font-family": "Arial, Helvetica, sans-serif", "font-size": "200%"});      }    });     }); Move the mouse pointer on the text to change the font family and size.

To change the text color with jQuery, use the jQuery css() method. The color css property is used to change text color.ExampleYou can try to run the following code to learn how to change text color with jQuery −Live Demo $(document).ready(function(){     $("p").on({         mouseenter: function(){             $(this).css("color", "red");         }     });     }); Move the mouse pointer on the text to change the text color.

You cannot return variable value from jQuery event function. To understand the reason, let us see how data is passed, which was created in the event handler of a button click.ExampleLive Demo $(document).ready(function(){     var a=document.getElementById('demo');     a.addEventListener('click', function(){        var s='Hello World!';        var event = new CustomEvent('build', { 'detail': s });        this.dispatchEvent(event);      })     document.getElementById('parent').addEventListener('build', getData, true);     function getData(e){        alert(e.detail);     } }); Click me

To bind jQuery events within dynamic content, use event delegation. You can try to run the following code to learn how to bind jQuery events within dynamic content returned via Ajax:Live Demo $(document).ready(function(){     $(".loadingAjax").on("click", function() {     event.preventDefault();     var url = $(this).attr("href"),         appendedContainer = $(".append");     $.ajax({     url: url,     type : 'get',     complete : function( qXHR, textStatus ) {         if (textStatus === 'success') {             var data = qXHR.responseText             appendedContainer.hide();             appendedContainer.append("Hi");             appendedContainer.fadeIn();         }       }     }); }); $(document).on("click", '.link', function(event) {     alert("Link clicked!"); }); });         a.test { font-weight: bold; }         body { font-family: sans-serif;}     Click to load Ajax

To handle the checkbox checked state, use the change event. It will check whether the checkox is checked or not.ExampleYou can try to run the following code to learn how to handle when checkbox checked state changed event in jQuery −Live Demo   jQuery Checkbox state     b {     color: red;   }       Check/ Uncheck this checkbox   $( "input" ).change(function() {   var $input = $( this );   $( "p" ).html(     ".attr( \"checked\" ): " + $input.attr( "checked" ) + "" +     ".prop( \"checked\" ): " + $input.prop( "checked" ) + "" +     ".is( \":checked\" ): " + $input.is( ":checked" ) + "" ); }).change();  

Yes, you can wrap a JavaScript event in a jQuery event. For wrapping, use the event object. You can try to run the following code to wrap a JavaScript event in a jQuery event −ExampleLive Demo $(document).ready(function(){      $('a.one').click(function(event){         event.preventDefault();      });      function test(event){         $.Event(event).preventDefault();      } });     a.test {       font-weight: bold;     }     body {       font-family:sans-serif;     } Tutorials     QA

To disable cut, copy and paste of a content in jQuery, use the jQuery bind() function.ExampleYou can try to run the following code to disable copy paste of content using jQuery −Live Demo $(document).ready(function(){   $('#mytext').bind("cut copy paste",function(e) {      e.preventDefault();   }); }); Copy, cut and paste function doesn't work here.

To disable right click on a page, use the jQuery bind() method.ExampleYou can try to run the following code to learn how to disable right click:Live Demo $(document).ready(function(){    $(document).bind("contextmenu",function(e){       return false;    }); }); Right click is disabled on this page.

To pass a jQuery event as a parameter in a method, use the bind() method.ExampleYou can try to run the following code to learn how to apss a jQuery event as a parameter:Live Demo $(document).ready(function(){    $("#btn1").bind("click", { key1: "value1", key2: "value2" }, myFunction);    function myFunction (event)    {      $("#myid").text(event.data.key1);    } });

To work with jQuery Datepicker onchange(), use the datepicker onSelect event. This will show which date we added currently and changed to.ExampleYou can try to run the following code to learn how to work jQuery Datepicker onchange:Live Demo           $( function() {       $(".date").datepicker({     onSelect: function(dateText) {       display("Selected date: " + dateText + ", Current Selected Value= " + this.value);       $(this).change();     }   }).on("change", function() {     display("Change event");   });   function display(msg) {     $("").html(msg).appendTo(document.body);   }   });       Date: