The onbeforeprint
property of the WindowEventHandlers
mixin is the event handler for processing beforeprint
events for the current window. These events are raised before the print dialog window is opened.
The beforeprint
and afterprint
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 an @media print
CSS at-rule, but it may be necessary to use these events in some cases.
window.addEventListener("beforeprint", function(event) { ... }); window.onbeforeprint = function(event) { ... };
Specification |
---|
HTML Standard (HTML) # handler-window-onbeforeprint |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
onbeforeprint |
63 |
12 |
6 |
≤6 |
50 |
13 |
63 |
63 |
? |
46 |
13 |
8.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeprint