![]() ![]() ![]() You can also see the target which is a reference to the node that was clicked. There are lots of properties giving you an idea of where the event occurred on the page (like pageX and offsetY) - these are slightly different because they depend on the reference point used to measure from. Here’s an example event you might see into a click event callback like handleClick. The second is the callback function - here it’s handleClick. ![]() Here’s it’s click - that’s a click of the mouse or a tap of the finger. JavaScript Notes & Reference 1 - The Basics 2 - Functions 3 - The Tricky Bits 4 - The DOM 5 - Events 6 - Serious Practice Exercises 7 - Logic and Flow. With Intermediate JavaScript, youll understand how to incorporate JavaScript in bigger and more complex web apps using concepts such as classes, promises. The first argument is a string - the name of the event to listen for. Here it’s being called on an element saved in the button variable. Var button = document.querySelector('#big-button') īutton.addEventListener('click', handleClick) ĪddEventListener is a method found on all DOM elements. Here’s a group of the things needed to listen for an event the callback function, an element and the call to listen for an event: To react to an event you listen for it and supply a function which will be called by the browser when the event occurs. An introduction to essential JavaScript design. ![]() For programmers who want to learn JavaScript quickly and properly, and for JavaScript programmers who want to deepen their skills and/or look up specific topics. Events occur when the page loads, when user interacts (clicks, hovers, changes) and myriad other times, and can be triggered manually too. If you like these JavaScript tutorials and courses, then please share them with your friends and colleagues. A comprehensive guide to intermediate and advanced JavaScript methodologies. In the browser most code is event-driven and writing interactive applications in JavaScript is often about waiting for and reacting to events, to alter the behavior of the browser in some way. Basic and intermediate JavaScript Tutorial for IGCSE and AS/A level Computer Science. ![]()
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