Persist Handlebars in global to keep it through HMR. Fixes #744 (#762)

firebase · Aug 9, 2024 · 08de4be · 08de4be
1 parent abd71c1
commit 08de4be
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/js/plugins/dotprompt/src/template.ts b/js/plugins/dotprompt/src/template.ts
@@ -19,7 +19,9 @@ import { DocumentData } from '@genkit-ai/ai/retriever';
 import Handlebars from 'handlebars';
 import { PromptMetadata } from './metadata.js';
 
-const Promptbars = Handlebars.create();
+const Promptbars: typeof Handlebars =
+ global['dotprompt.handlebars'] || Handlebars.create();
+global['dotprompt.handlebars'] = Promptbars;
 
 function jsonHelper(serializable: any, options: { hash: { indent?: number } }) {
  return new Promptbars.SafeString(