Adds new file custom-preload that is loaded in a different order than custom.js before the main.js script is executed

nbclassic/static/custom/custom-preload.js

@@ -0,0 +1,13 @@
+// leave at least 2 line with only a star on it below, or doc generation fails
+/**
+ *
+ *
+ * Same goal as custom.js, but loaded in a different order, before the main.js script is executed
+ *
+ *
+ * @module IPython
+ * @namespace IPython
+ * @class custompreloadjs
+ * @static
+ */
+

nbclassic/static/edit/js/main.js

@@ -15,6 +15,7 @@ requirejs([
     'edit/js/notificationarea',
     'bidi/bidi',
     'auth/js/loginwidget', 
+    'custom-preload'
 ], function(
     $,
     contents_service,

nbclassic/static/notebook/js/main.js

@@ -53,7 +53,8 @@ requirejs([
     'notebook/js/searchandreplace',
     'notebook/js/clipboard',
     'bidi/bidi',
-    'notebook/js/celltoolbarpresets/tags'
+    'notebook/js/celltoolbarpresets/tags',
+    'custom-preload'
 ], function(
     $,
     contents_service,

nbclassic/static/terminal/js/main.js

@@ -8,6 +8,7 @@ requirejs([
     'auth/js/loginwidget',
     'services/config',
     'terminal/js/terminado',
+    'custom-preload'
 ], function(
     $,
     utils,

nbclassic/static/tree/js/main.js

@@ -38,6 +38,7 @@ requirejs([
     'tree/js/shutdownbutton',
     'auth/js/loginwidget',
     'bidi/bidi',
+    'custom-preload'
 ], function(
     $,
     contents_service,

nbclassic/templates/page.html

@@ -30,6 +30,7 @@
           paths: {
             'auth/js/main': 'auth/js/main.min',
             custom : '{{ base_url }}custom',
+            'custom-preload' : '{{ base_url }}custom-preload',
             nbextensions : '{{ base_url }}nbextensions',
             kernelspecs : '{{ base_url }}kernelspecs',
             underscore : 'components/underscore/underscore-min',
@@ -99,6 +100,18 @@
           }
       })
 
+      // error-catching custom-preload.js shim.
+      define("custom-preload", function (require, exports, module) {
+          try {
+              var custom = require('custom/custom-preload');
+              console.debug('loaded custom-preload.js');
+              return custom;
+          } catch (e) {
+              console.error("error loading custom-preload.js", e);
+              return {};
+          }
+      })
+
     document.nbjs_translations = {{ nbjs_translations|safe }};
     document.documentElement.lang = navigator.language.toLowerCase();
     </script>

tools/build-main.js

@@ -28,7 +28,9 @@ var rjs_config = {
     "xtermjs-fit": 'components/xterm.js-fit/index',
     "jquery-typeahead": 'components/jquery-typeahead/dist/jquery.typeahead.min',
     contents: 'empty:',
-    custom: 'empty:',
+    custom: 'empty:',   
+    'custom-preload': 'empty:',
+
   },
   map: { // for backward compatibility
     "*": {
@@ -60,6 +62,7 @@ var rjs_config = {
 
   exclude: [
     "custom/custom",
+    "custom/custom-preload",
   ]
 };