Fix [ERR_REQUIRE_ESM] error when importing hf_transformers

Author: JonaMX

libs/langchain-community/src/embeddings/hf_transformers.ts

@@ -1,6 +1,8 @@
-import { Pipeline, pipeline } from "@xenova/transformers";
+import { Pipeline } from "@xenova/transformers";
 import { Embeddings, type EmbeddingsParams } from "@langchain/core/embeddings";
 import { chunkArray } from "@langchain/core/utils/chunk_array";
+const TransformersApi = Function('return import("@xenova/transformers")')();
+
 
 export interface HuggingFaceTransformersEmbeddingsParams
   extends EmbeddingsParams {
@@ -100,6 +102,7 @@ export class HuggingFaceTransformersEmbeddings
   }
 
   private async runEmbedding(texts: string[]) {
+    const { pipeline } = await TransformersApi;
     const pipe = await (this.pipelinePromise ??= pipeline(
       "feature-extraction",
       this.model