Window: beforeprint event

{{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.

Syntax

Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}} , or set an event handler property.

addEventListener("beforeprint", (event) => {});
onbeforeprint = (event) => {};

Event type

A generic {{domxref("Event")}} .

Examples

Using addEventListener():

window.addEventListener("beforeprint", (event) => {
  console.log("Before print");
});

Using the onbeforeprint event handler property:

window.onbeforeprint = (event) => {
  console.log("Before print");
};

Specifications

{{Specifications}} 

Browser compatibility

{{Compat}} 

See also

• Related events: {{domxref("Window/afterprint_event", "afterprint")}}