improve(pdf-loader): update error message to specify support for pdf-… (#9253)

Co-authored-by: Christian Bromann <[email protected]>

Author: sapenlei

.changeset/orange-cars-mix.md

@@ -0,0 +1,5 @@
+---
+"@langchain/community": patch
+---
+
+improve(pdf-loader): update error message to specify support for pdf-parse v1 only

libs/langchain-community/src/document_loaders/fs/pdf.ts

@@ -143,7 +143,7 @@ async function PDFLoaderImports() {
   } catch (e) {
     console.error(e);
     throw new Error(
-      "Failed to load pdf-parse. Please install it with eg. `npm install pdf-parse`."
+      "Failed to load pdf-parse. This loader currently supports pdf-parse v1 only. Please install v1, e.g. `npm install pdf-parse@^1` (v2 is not yet supported)."
     );
   }
 }

libs/langchain-community/src/document_loaders/web/pdf.ts

@@ -128,7 +128,7 @@ async function PDFLoaderImports() {
   } catch (e) {
     console.error(e);
     throw new Error(
-      "Failed to load pdf-parse. Please install it with eg. `npm install pdf-parse`."
+      "Failed to load pdf-parse. This loader currently supports pdf-parse v1 only. Please install v1, e.g. `npm install pdf-parse@^1` (v2 is not yet supported)."
     );
   }
 }