preview_collabedit.js

(function(exports, $) {
    if (!exports.previewWindow) {
        exports.previewWindow = window.open();

        var $input = $("#frame_the_input").contents().find("#textarea");

        exports.updatePreviewWindow = function() {
            exports.previewWindow.location.href = "data:text/html," + $input.val();
            return false;
        };

        exports.updatePreviewWindow();

        var $trigger = $("<a href='#'>Preview</a>");
        $("#doc_link_bar").append(" | ").append($trigger);
        $trigger.click(exports.updatePreviewWindow);
    }
}(window, jQuery));