Move to optional dependencies.

Author: bernardobelchior

packages/x-charts-pro/package.json

@@ -44,7 +44,6 @@
     "@mui/x-charts-vendor": "workspace:*",
     "@mui/x-internals": "workspace:*",
     "@mui/x-license": "workspace:*",
-    "rasterizehtml": "^1.3.1",
     "clsx": "^2.1.1",
     "prop-types": "^15.8.1"
   },
@@ -64,11 +63,15 @@
       "optional": true
     }
   },
+  "optionalDependencies": {
+    "rasterizehtml": "^1.3.1"
+  },
   "devDependencies": {
     "@mui/material": "^7.0.2",
     "@mui/system": "^7.0.2",
     "@types/prop-types": "^15.7.14",
     "csstype": "^3.1.3",
+    "rasterizehtml": "^1.3.1",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "rimraf": "^6.0.1"

packages/x-charts-pro/src/internals/plugins/useChartProExport/exportImage.ts

@@ -3,7 +3,15 @@ import { createExportIframe, loadStyleSheets } from './common';
 import { ChartImageExportOptions } from './useChartProExport.types';
 
 export const getDrawDocument = async () => {
-  const module = await import('rasterizehtml');
+  let module;
+  try {
+    module = await import('rasterizehtml');
+  } catch (error) {
+    throw new Error(
+      `MUI X: Failed to import 'rasterizehtml' module. This dependency is mandatory when exporting a chart as an image. Make sure you have it installed as a dependency.`,
+      { cause: error },
+    );
+  }
 
   return module.drawDocument;
 };