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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 methods like addEventListener(), or set an event handler property.

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

onbeforeprint = (event) => { }

Event type

A generic 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

Specification
HTML> # event-beforeprint>
HTML> # handler-window-onbeforeprint>

Browser compatibility