Let us now see an example to implement the jQuery keyup() method. The syntax is as follows (selector).keyup(func) Example. When a user enters a key in the input field, we will display what key was pressed below. It occurs when the keyboard key is released. An example using the jQuery keyup method In this example, we will just have a simple input field with a div below it. When you type into the text box, you should see the key press events being registered there. The keyup() method in jQuery is used to trigger the keyup event. This method is used to perform any action or run a function as keypress event occurs in your web document. Whenever a key is triggered, the keyup () method binds function to an event on an element. In this changed version, I'm using jQuery's append() function to output the debugging messages into a new div I've added below the text box. When you run the above example, you would get the following output: JQuery Keyup () Event This event occurs when key is released in the keyboard. keyup() called ' + xTriggered + ' time(s).' I've made some small changes to make a working version (note I'm using the Google-hosted jQuery you can point that at your local version instead and it should still work fine.) The bind lives on the body of the document, so regardless of what elements are added, moved, removed and re-added, all descendants of body matching the selector specified will retain proper binding.
Tip: The order of events related to the onkeyup event: onkeydown onkeypress.
Specifically, it seems to use a print function that's absent from the latest jQuery (perhaps it's included in that missing events.js script?) It prevents double binding in the case where the script is loaded more than once, such as in an AJAX request. The onkeyup event occurs when the user releases a key (on the keyboard). The code on that page seems a little broken.
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