HTML onpopstate Event Attribute
Description
The event attribute onpopstate
is an event handler for the popstate event on the window.
A popstate event is dispatched to the window each time the active history entry changes between two history entries for the same document. If the activated history entry was created by a call to history.pushState(), or was affected by a call to history.replaceState(), the popstate event's state property contains a copy of the history entry's state object.
Syntax
<element onpopstate="script">
Values
- scriptThe name of the script to use when the event has been triggered.
Example
<!DOCTYPE html>
<html>
<body>
<p>Reload page to trigger event</p>
<script>
window.onpopstate = function(event) {
alert("EXAMPLE: location: " + document.location +
", state: " + JSON.stringify(event.state));
};
history.pushState({
page: 1
}, "title 1", "?page=1");
history.pushState({
page: 2
}, "title 2", "?page=2");
history.replaceState({
page: 3
}, "title 3", "?page=3");
// alerts "location:
// https://www.cssportal.com/html-event-attributes/onpopstate.php?page=1,
// state: {"page":1}"
history.back();
// alerts "location: about:blank, state: null"
history.back();
</script>
</body>
</html>
Browser Support
Desktop | |||||
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Tablets / Mobile | |||||
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