To detect loading of an image with jQuery, use the load() event handler.Note: The load() method deprecated in jQuery version 1.8. It was completely removed in version 3.0. To see its working, add jQuery version for CDN before 3.0.ExampleYou can try to run the following code to learn how to detect when image loads:Live Demo $(document).ready(function(){     $("img").load(function(){         alert("Image successfully loaded.");     }); }); Note: The load() method deprecated in jQuery version 1.8. It was completely removed in version 3.0. To see its working, add jQuery version for CDN before 3.0.

Ti check whether jQuery events are blocking, use the .triggerHandler() method, since it returns anything the last event handler for that event on that selector returns.ExampleLive Demo $(document).ready(function(){     var myValue = "John";     $("body").bind("eventName", function(e, value) {        return value + " Jacob";     });    var result = $("body").triggerHandler("eventName", myValue);    alert(result); }); This shows an alert box.

To bind events on dynamically created elements, you need to load dynamically. You can try to run the following code to learn how to bind events on dynamically created elements. Here, we will generate a new list item on button click.ExampleLive Demo $(document).ready(function(){     $("button").click(function(){       $("ul").append("new item ×");       });       $(document).on("click", "a.del" , function() {         $(this).parent().remove();     }); });     Add     Click the above button to dynamically add new list items. You can remove it later.             item    

Let’s say an event handler is attached to your element. For example,$('#foo').click(function() { console.log('clicked!') });Then you can debug it like this:For jQuery 1.3.xvar cEvent = $('#foo').data("events").click; jQuery.each(cEvent, function(key, value) {    console.log(value) }) For jQuery 1.4.xvar cEvent = $('#foo').data("events").click; jQuery.each(cEvent, function(key, handlerObj) {     console.log(handlerObj.handler) }) For jQuery 1.8.x+var cEvents = $._data($('#foo')[0], "events").click; jQuery.each(cEvents, function(key, handlerObj) {   console.log(handlerObj.handler) })

jQuery load() methodThe load() method is used to attach event handler to load event.ExampleYou can try to run the following code to learn how to work with jQuery load() method.Note:  The method deprecated in jQuery 1.8. It got finally removed in jQuery 3.0. To run the following code, add jQuery version lesser than 1.8, Live Demo $(document).ready(function(){     $("img").load(function(){         alert("This is an image.");     }); }); This image will load only in jQuery version lesser than 1.8 jQuery ready() methodEasily specify what ... Read More

To trigger the same function with multiple events, use the jQuery on() method with multiple events such as click, dblclick, mouse enter, mouse leave, hover, etc.ExampleYou can try to run the following code to learn how to work the same function with jQuery multiple events:Live Demo $(document).ready(function(){     $("p").on({             mouseenter: function(){             $(this).css("background-color", "gray");         },                   mouseleave: function(){             $(this).css("background-color", "red");         },                 dblclick: function(){             $(this).css("background-color", "yellow");         }             }); }); Click, double click and move the mouse pointer.

Returning false from jQuery event handlers is like calling both preventDefault() and stopPropagation(). The preventDefault() method prevents the browser from executing the default action.ExampleYou can try to run the following code to run event.preventDefault() method in jQuery −Live Demo           jQuery preventDefault() method                              $(document).ready(function() {             $("a").click(function(event){                event.preventDefault();                alert( "Default behavior is disabled!" );             ... Read More

To check which key has been pressed, use the onkeydown attribute.ExampleYou can try to run the following code to get which key is pressed:Live Demo Press a key in the below box to get which key is pressed.   function demoFunction(event) {     var a = event.key;     document.getElementById("test").innerHTML = "You've pressed the key: " + a;   }

To prevent jQuery events from bubbling up to parent elements, use the stopPropogation() method. The stopPropagation() method stops the bubbling of an event to parent elements, preventing any parent handlers from being notified of the event.ExampleYou can try to run the following code to prevent jQuery events from bubbling up to parent elements −Live Demo           jQuery stopProagation() method                              $(document).ready(function() {             $("div").click(function(event){                alert("This is : " + $(this).text());                event.stopPropagation();             });          });                              div {             margin:20px;             padding:20px;             border:2px solid #666;             width:160px;          }                             Click on any box to see the effect:                        OUTER BOX                       INNER BOX                            

Trigger a hover event from another element, using the hover() method over the selected element.You can try to run the following code to learn how to trigger a hover event from another element using jQuery: