files/en-us/web/api/window/beforeprint_event/index.md
{{APIRef}}
The beforeprint event is fired when the associated document is about to be printed or previewed for printing.
The {{domxref("Window.afterprint_event", "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.
Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}}, or set an event handler property.
addEventListener("beforeprint", (event) => { })
onbeforeprint = (event) => { }
A generic {{domxref("Event")}}.
Using addEventListener():
window.addEventListener("beforeprint", (event) => {
console.log("Before print");
});
Using the onbeforeprint event handler property:
window.onbeforeprint = (event) => {
console.log("Before print");
};
{{Specifications}}
{{Compat}}