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The hashchange event is fired when the fragment identifier of the URL has changed (the part of the URL that follows the # symbol, including the # symbol).
General info
- Specification
- HTML5
- Interface
- HashChangeEvent
- Bubbles
- Yes
- Cancelable
- No
- Target
- defaultView
- Default Action
- None
Properties
| Property | Type | Description |
|---|---|---|
target Read only |
EventTarget |
The browsing context (<code>window</code>). |
type Read only |
DOMString |
The type of event. |
bubbles Read only |
Boolean |
Whether the event normally bubbles or not |
cancelable Read only |
Boolean |
Whether the event is cancellable or not? |
oldURL Read only |
string | The previous URL from which the window was navigated. |
| newURL Read only | string |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 5.0 | 3.6 (1.9.2) Support for the oldURL/newURL attributes added in Firefox 6. |
8.0oldURL/newURL attributes are not supported. |
10.6 | 5.0 |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | 2.2 | 1.0 (1.9.2) | 9.0 | 11.0 | 5.0 |
There are several fallback scripts listed on this page. Basically those scripts check the location.hash at a regular interval. Here is a version that allows only one handler to be bound to the <code>window.onhashchange</code> property:
(function(window) {
// exit if the browser implements that event
if ( "onhashchange" in window.document.body ) { return; }
var location = window.location,
oldURL = location.href,
oldHash = location.hash;
// check the location hash on a 100ms interval
setInterval(function() {
var newURL = location.href,
newHash = location.hash;
// if the hash has changed and a handler has been bound...
if ( newHash != oldHash && typeof window.onhashchange === "function" ) {
// execute the handler
window.onhashchange({
type: "hashchange",
oldURL: oldURL,
newURL: newURL
});
oldURL = newURL;
oldHash = newHash;
}
}, 100);
})(window);
Syntax
window.onhashchange = funcRef;
or
<body onhashchange="funcRef();">
or
window.addEventListener("hashchange", funcRef, false);
Parameters
funcRef- A reference to a function.
Example
if ("onhashchange" in window) {
alert("The browser supports the hashchange event!");
}
function locationHashChanged() {
if (location.hash === "#somecoolfeature") {
somecoolfeature();
}
}
window.onhashchange = locationHashChanged;
The hashchange event
The dispatched hashchange event has the following fields:
| Field | Type | Description |
newURL |
DOMString |
The new URL to which the window is navigating. |
oldURL |
DOMString |
The previous URL from which the window was navigated. |