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The property onbeforeprint sets and returns the onbeforeprint event handler code for the current window.


window.onbeforeprint = event handling code


Some browsers (including Firefox 6 and later and Internet Explorer) send beforeprint and afterprint events to let content determine when printing may have occurred. You can use this to adjust the user interface presented during printing (such as by displaying or hiding user interface elements during the print process).

The event beforeprint is raised before the print job dialog appears.

For Webkit-based browsers, you can create an equivalent result with window.matchMedia('print').

var mediaQueryList = window.matchMedia('print');
mediaQueryList.addListener('change', function(mql) {
  if(mql.matches) {
    console.log('webkit equivalent of onbeforeprint');



Specification Status Comment
HTML Living Standard
The definition of 'onbeforeprint' in that specification.
Living Standard  

Browser compatibility

No compatibility data found. Please contribute data for "" (depth: 1) to the MDN compatibility data repository.
Feature Chrome Firefox (Gecko) Edge Internet Explorer Opera Safari
Basic support 63.0 6.0 (Yes) (Yes) No support No support
Feature Android Webview Chrome for Android Firefox Mobile (Gecko) Edge IE Mobile Opera Mobile Safari Mobile
Basic support No support ? ? ? ? No support ?

See also


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 Last updated by: jmanos,