History: replaceState() method
The History.replaceState()
method modifies the current
history entry, replacing it with the state object and
URL passed in the method parameters. This method is particularly useful
when you want to update the state object or URL of the current history entry in response
to some user action.
This method is asynchronous. Add a listener for the popstate
event in order to determine when the navigation has completed. The state
parameter will be available in it.
Syntax
js
replaceState(state, unused)
replaceState(state, unused, url)
Parameters
state
-
An object which is associated with the history entry passed to the
replaceState()
method. The state object can benull
. unused
-
This parameter exists for historical reasons, and cannot be omitted; passing the empty string is traditional, and safe against future changes to the method.
url
Optional-
The URL of the history entry. The new URL must be of the same origin as the current URL; otherwise replaceState throws an exception.
Return value
None (undefined
).
Examples
Suppose https://www.mozilla.org/foo.html
executes the following JavaScript:
js
const stateObj = { foo: "bar" };
history.pushState(stateObj, "", "bar.html");
On the next page you could then use history.state
to access the stateObj
that was just added.
The explanation of these two lines above can be found in the Example of pushState()
method section of the Working with the History API article. Then suppose
https://www.mozilla.org/bar.html
executes the following
JavaScript:
js
history.replaceState(stateObj, "", "bar2.html");
This will cause the URL bar to display
https://www.mozilla.org/bar2.html
, but won't cause the browser
to load bar2.html
or even check that bar2.html
exists.
Suppose now that the user navigates to
https://www.microsoft.com
, then clicks the Back button. At this
point, the URL bar will display https://www.mozilla.org/bar2.html
.
If the user now clicks Back again, the URL bar will
display https://www.mozilla.org/foo.html
, and totally bypass bar.html.
Specifications
Specification |
---|
HTML Standard # dom-history-replacestate-dev |
Browser compatibility
BCD tables only load in the browser