HTML onload Event Attributes

The onloadevent attribute is a powerful and widely used feature in web development. It is associated with the lifecycle of a web page or an element and is triggered when the element has been fully loaded. This attribute is commonly applied to the tag, images, iframes, and other media elements to execute JavaScript code after the element's content has finished loading.

Defining HTML onload Event Attributes

The onloadevent is a client-side event handler that executes once a specific HTML element or the entire webpage is completely loaded into the browser. It is an essential part of dynamic and interactive web applications because it ensures that certain tasks, such as initialization scripts, animations, or API calls, are executed only when the required resources are available.

Window Event Attributes

AttributesDescription
onafterprintFires after the document has started printing or the print dialog box has been closed.
onbeforeprintFires before the document is about to be printed.
onbeforeunloadFires when the document is about to be unloaded.
onerrorFires when an error occurs during loading of an external file (e.g., images or scripts).
onhashchangeFires when the anchor part of the URL has changed.
onloadFires when the page has finished loading.
onmessageFires when a message is received through an event source (e.g., WebSocket or iframe).
onofflineFires when the browser starts working offline.
ononlineFires when the browser starts working online.
onpagehideFires when the user navigates away from a webpage.
onpageshowFires when the user navigates to a webpage.
onpopstateFires when the active history entry changes (e.g., when the user clicks the back or forward button).
onresizeFires when the browser window is resized.
onstorageFires when a Web Storage area is updated (e.g., localStorage or sessionStorage).
onunloadFires once a page is unloaded (or the browser window is closed).

Important Notes:

We are currently focusing on showcasing window events, providing valuable insights into their functionality and use cases. In the near future, we plan to expand our resources by introducing a comprehensive guide covering A-to-Z HTML event attributes. This addition will serve as a complete reference for developers at all levels, empowering you to effectively utilize event attributes in your projects. Stay connected for these upcoming enhancements.

HTML AttributesGlobal AttributesEvent Attributes
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onloadYesYesYesYesYes