bump Plotly.js to 2.4.0

Author: nicolaskruchten

CHANGELOG.md

@@ -2,6 +2,14 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## UNRELEASED
+
+### Updated
+
+- Updated Plotly.js to from version 2.3.1 to version 2.4.0. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#240----2021-08-27) for more information. These changes are reflected in the auto-generated `plotly.graph_objects` module. Notable changes include:
+  - Added `legend.groupclick` options
+  - Provide bbox of hover items in event data
+
 ## [5.2.2] - 2021-08-23
 
 ### Fixed

packages/javascript/jupyterlab-plotly/package-lock.json

@@ -65,7 +65,7 @@
     "@lumino/messaging": "^1.2.3",
     "@lumino/widgets": "^1.8.1",
     "lodash": "^4.17.4",
-    "plotly.js": "^2.3.1"
+    "plotly.js": "^2.4.0"
   },
   "jupyterlab": {
     "extension": "lib/jupyterlab-plugin",

packages/javascript/jupyterlab-plotly/package.json

@@ -2683,8 +2683,18 @@
       "valType": "number"
      }
     },
+    "groupclick": {
+     "description": "Determines the behavior on legend group item click. *toggleitem* toggles the visibility of the individual item clicked on the graph. *togglegroup* toggles the visibility of all items in the same legendgroup as the item clicked on the graph.",
+     "dflt": "togglegroup",
+     "editType": "legend",
+     "valType": "enumerated",
+     "values": [
+      "toggleitem",
+      "togglegroup"
+     ]
+    },
     "itemclick": {
-     "description": "Determines the behavior on legend item click. *toggle* toggles the visibility of the item clicked on the graph. *toggleothers* makes the clicked item the sole visible item on the graph. *false* disable legend item click interactions.",
+     "description": "Determines the behavior on legend item click. *toggle* toggles the visibility of the item clicked on the graph. *toggleothers* makes the clicked item the sole visible item on the graph. *false* disables legend item click interactions.",
      "dflt": "toggle",
      "editType": "legend",
      "valType": "enumerated",
@@ -2695,7 +2705,7 @@
      ]
     },
     "itemdoubleclick": {
-     "description": "Determines the behavior on legend item double-click. *toggle* toggles the visibility of the item clicked on the graph. *toggleothers* makes the clicked item the sole visible item on the graph. *false* disable legend item double-click interactions.",
+     "description": "Determines the behavior on legend item double-click. *toggle* toggles the visibility of the item clicked on the graph. *toggleothers* makes the clicked item the sole visible item on the graph. *false* disables legend item double-click interactions.",
      "dflt": "toggleothers",
      "editType": "legend",
      "valType": "enumerated",