Window: beforeprint event

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

Browser compatibility

See also

• Related events: afterprint