Load underscore globally

notebook/static-src/base/js/globals.js

@@ -63,7 +63,22 @@ module.exports = new Promise(function(resolve, reject) {
                 Object.defineProperty(window, 'CodeMirror', codeMirrorProperty);
                 console.log('CodeMirror loaded and available in global namespace');
                 
-                resolve();
+                
+                requirejs(['underscore'], function(_) {
+                    var underscoreProperty = {
+                        get: function() {
+                            return _;
+                        },
+                        configurable: false
+                    };
+                    Object.defineProperty(window, '_', underscoreProperty);
+                    console.log('underscore loaded and available in global namespace');
+
+                    resolve();
+                }, function(err) {
+                    console.error('could not load underscore');
+                    reject(err);
+                });
             }, function(err) {
                 console.error('could not load CodeMirror and/or it\'s plugins');
                 reject(err);

notebook/static-src/base/js/keyboard.js

@@ -11,7 +11,6 @@
     "use strict";
 
     var utils = require('base/js/utils');
-    var _ = require('underscore');
 
 
     /**

notebook/static-src/notebook/js/about.js

@@ -3,7 +3,6 @@
     'use strict';
         
     var dialog = require('base/js/dialog');
-    var _ = require('underscore');
     var IPython = require('base/js/namespace');
 
     $('#notebook_about').click(function () {

notebook/static-src/services/kernels/serialize.js

@@ -2,8 +2,6 @@
 // Distributed under the terms of the Modified BSD License.
     "use strict";
 
-    var _ = require('underscore');
-
     var _deserialize_array_buffer = function (buf) {
         var data = new DataView(buf);
         // read the header: 1 + nbufs 32b integers

package.json

@@ -42,7 +42,6 @@
     "rimraf": "^2.4.2",
     "term.js": "~0.0.4",
     "text-encoding": "~0.1",
-    "typeahead": "^0.2.0",
-    "underscore": "~1.5"
+    "typeahead": "^0.2.0"
   }
 }