hashchange | onhashchange event
Raised when there are changes to the portion of a URL that follows the number sign (#).
|HTML Attribute||<element onhashchange = "handler(event)">|
|Event Property||object.onhashchange = handler;|
|attachEvent Method||object.attachEvent("onhashchange", handler)|
|addEventListener Method||object.addEventListener("hashchange", handler, useCapture)|
Event handler parameters
- pEvtObj [in]
There are no standards that apply here.
Windows Internet Explorer 8. The browser's Back and Forward buttons do not generate onhashchange events for frames or iframes; instead, the frame is refreshed each time. Web pages hosted in frames or iframes should use their onload handler or equivalent to read the current URL hash information from the location.hash property and set their states accordingly.
When first navigating to a page that contains a hash identifier in the URL, an onhashchange event is not fired. It is expected that the freshly loaded page can inspect the value of the location.hash property to extract the current hash value. After this first page loads, setting the hash property will fire the onhashchange event as expected. This behavior avoids any negative impact on Web page load performance by removing a possible redundant event.
To invoke this event, do one of the following:
The pEvtObj parameter is required for the following interfaces:
Attaching an event handler to a new onhashchange event enables the page to detect when the hash has changed and an AJAX navigation has occurred. See Introducing AJAX Navigations for a more robust example.