Window: beforeprint event
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2019.
The beforeprint event is fired when the associated document is about to be printed or previewed for printing.
The afterprint and beforeprint events allow pages to change their content before printing starts (perhaps to remove a banner, for example) and then revert those changes after printing has completed. In general, you should prefer the use of a @media print CSS at-rule, but it may be necessary to use these events in some cases.
Syntax
Use the event name in addEventListener():
addEventListener("beforeprint", (event) => { })
Alternatively, assign to the event handler property of the interface:
onbeforeprint = (event) => { }
Event type
A generic Event.
Examples
Using addEventListener():
window.addEventListener("beforeprint", (event) => {
console.log("Before print");
});
Using the onbeforeprint event handler property (but note that this replaces other event listeners added using onbeforeprint, if any):
window.onbeforeprint = (event) => {
console.log("Before print");
};
Specifications
| Specification |
|---|
| HTML> # event-beforeprint> |
| HTML> # handler-window-onbeforeprint> |
Browser compatibility
See also
- Related events:
afterprint