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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
Attributes | Description |
---|---|
onafterprint | Fires after the document has started printing or the print dialog box has been closed. |
onbeforeprint | Fires before the document is about to be printed. |
onbeforeunload | Fires when the document is about to be unloaded. |
onerror | Fires when an error occurs during loading of an external file (e.g., images or scripts). |
onhashchange | Fires when the anchor part of the URL has changed. |
onload | Fires when the page has finished loading. |
onmessage | Fires when a message is received through an event source (e.g., WebSocket or iframe). |
onoffline | Fires when the browser starts working offline. |
ononline | Fires when the browser starts working online. |
onpagehide | Fires when the user navigates away from a webpage. |
onpageshow | Fires when the user navigates to a webpage. |
onpopstate | Fires when the active history entry changes (e.g., when the user clicks the back or forward button). |
onresize | Fires when the browser window is resized. |
onstorage | Fires when a Web Storage area is updated (e.g., localStorage or sessionStorage). |
onunload | Fires once a page is unloaded (or the browser window is closed). |
HTML Attributes | Global Attributes | Event Attributes |
---|---|---|
To view the full list | To view the full list | To view the full list |
elements | |||||
---|---|---|---|---|---|
onload | Yes | Yes | Yes | Yes | Yes |
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