fix: #488 types JsonEditor and CreateJSONEditorProps not exported…

… in `vanilla-jsoneditor`

rollup.config.vanilla-types.js

@@ -12,5 +12,23 @@ export default {
       format: 'es'
     }
   ],
-  plugins: [dts()]
+  plugins: [dts(), exportJsonEditorClass()]
+}
+
+// The DTS plugin doesn't export the JsonEditor class that is generated by Svelte whilst compiling,
+// so we append an export for it manually. Similarly, the CreateJSONEditorProps interface is not
+// exported by DTS, so we add an export for it too.
+function exportJsonEditorClass() {
+  return {
+    name: 'export-json-editor',
+    transform: (code, id) => {
+      if (id.endsWith('index-vanilla.d.ts')) {
+        const customExports = 'export type { JsonEditor, CreateJSONEditorProps }'
+
+        return `${code}\n${customExports}\n`
+      }
+
+      return code
+    }
+  }
 }