onbeforeprint() and onafterprint() equivalent for non IE browsers

I want to send some info back to my database when a user prints a certain web page. I can do this in IE with onbeforeprint() and onafterprint() but I would like to browser agnostic way of doing the same thing. Don't care which combination of technologies I have to use (PHP, MySQL, JavaScript, HTML) so long as it gets done. Any ideas?

EDIT:

Still having some problems with this. I tried the putting my function in my Print.css as an image, but I am messing it up some how. Then I tried just adding a event listener, but I cannot get that to work quite right either. If anyone can provide some more details on how I might call a function right before print in ANY browser I would appreciate it.

EDIT:

I am giving up on this for now, I have settled with another way of doing what I want. I look forward to the day when FireFox supports onbeforeprint() and onafterprint().

I m not sure other browsers will allow you to. You could of course specify an image somewhere in a print stylesheet, which probably only will be called on a print, for the onbeforeprint

quietmint

Many browsers now support window.matchMedia. This API allows you to detect when CSS media queries go into effect (e.g., rotating the screen or printing the document). For a cross-browser approach, combine window.matchMedia with window.onbeforeprint/window.onafterprint.

The following may result in multiple calls to beforePrint() and afterPrint() (for example, Chrome fires the listener every time the print preview is regenerated). This may or may not be desirable depending on the particular processing you're doing in response to the print.

if ('matchMedia' in window) {
    // Chrome, Firefox, and IE 10 support mediaMatch listeners
    window.matchMedia('print').addListener(function(media) {
        if (media.matches) {
            beforePrint();
        } else {
            // Fires immediately, so wait for the first mouse movement
            $(document).one('mouseover', afterPrint);
        }
    });
} else {
    // IE and Firefox fire before/after events
    $(window).on('beforeprint', beforePrint);
    $(window).on('afterprint', afterPrint);
}

More: http://tjvantoll.com/2012/06/15/detecting-print-requests-with-javascript/

Try masking the native window.print() with your own...

// hide our vars from the global scope
(function(){

  // make a copy of the native window.print
  var _print = this.print;

  // create a new window.print
  this.print = function () {
    // if `onbeforeprint` exists, call it.
    if (this.onbeforeprint) onbeforeprint(this); 
    // call the original `window.print`.
    _print(); 
    // if `onafterprint` exists, call it.
    if (this.onafterprint) onafterprint(this);
  }

}())

Updated: comments.

(function() {
var beforePrint = function() {
    if($('.modal').hasClass('in')){
        $('body').removeClass('modal-open');
    }
};
var afterPrint = function() {
    if($('.modal').hasClass('in')){
        $('body').addClass('modal-open');
    }
};

if (window.matchMedia) {
    var mediaQueryList = window.matchMedia('print');
    mediaQueryList.addListener(function(mql) {
        if (mql.matches) {
            beforePrint();
        } else {
            afterPrint();
        }
    });
}
window.onbeforeprint = beforePrint;
window.onafterprint = afterPrint;}());

This code works on all browser for detecting print events.

I think that it's simply not possible to this properly. Or at least - not with any technology I know nor with any of the answers given previously.

Both using onafterprint and using serverside dynamic-image-generating script would tell you that the page was printed even when the visitor merely went to print preview mode and then canceled out.

However, I would like to learn how to get the proper information, so that I can be sure that page was actually printed.

来源：https://stackoverflow.com/questions/3339789/onbeforeprint-and-onafterprint-equivalent-for-non-ie-browsers

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onbeforeprint