emitDecoratorMetadata Extension

Enable TypeScript emitDecoratorMetadata compiler option. Required for ORMs like TypeORM.

Setup

import { emitDecoratorMetadata } from "@trigger.dev/build/extensions/typescript";

export default defineConfig({
  project: "<project ref>",
  build: {
    extensions: [emitDecoratorMetadata()],
  },
});

Requirements

1. "emitDecoratorMetadata": true in your tsconfig.json
2. typescript installed in devDependencies

Notes

• Not enabled by default — has a performance cost
• Hooks into esbuild and uses the TypeScript compiler API
• Only compiles files where decorators are detected
• Primary use case: TypeORM and decorator-based ORMs