Script to resume receiving cells output after a notebook reloaded or even opened in other browser

resume_output_receiving_in_notebooks.js

// This script makes it possible to resume cells output receiving after a notebook reloads.
// Works even when the notebook is open in other browser (output will be shown in all opened windows).
// Works with keras and tqdm (not with tqdm_notebook).
// 
// Add this code into your ~/.jupyter/custom/custom.js

define([
        'base/js/namespace',
        'base/js/promises'
     ], function(Jupyter, promises) {
         promises.app_initialized.then(function(appname) {
             if (appname === 'NotebookApp') {
                console.log("Adding hack to resume receiving output after notebook reloads");

                IPython.notebook.events.on('execute.CodeCell', function(evt, data) {
                    // Put current message id into cell's metadata
                    data.cell._metadata['_last_msg_id'] = data.cell.last_msg_id;
                    // Force to save the notebook after a cell executed.
                    // However, it might be not desirable. Just comment line below
                    IPython.notebook.save_notebook();
                });

                IPython.notebook.events.on('received_unsolicited_message.Kernel', function(evt, data) {
                    // Get supposed receiver's message id
                    var p_msg_id = data.parent_header.msg_id;
                    var cells = IPython.notebook.get_cells();
                    // Try to find proper receiver
                    for (var i = 0; i < cells.length; i ++) {
                        if (cells[i]._metadata['_last_msg_id'] == p_msg_id) {
                            cell = cells[i];
                            console.log("Send unsolicited message to cell " + i);
                            // We use _* instead of * as a mark of being resumed by our hack
                            cell.set_input_prompt('_*');
                            cell.element.addClass("running");
                            cell.output_area.handle_output(data);
                            break;
                        }
                    }
                });
             }
         });
     });