promptfoo/examples/ts-config

TypeScript Configuration Example for promptfoo

This guide demonstrates how to set up a TypeScript configuration for promptfoo using promptfooconfig.ts.

Prerequisites

Note: This example requires Node.js 20 or later.

Before running the evaluation, install the @swc-node/register package or another suitable TypeScript loader for Node.js:

npm install @swc-node/register

Running the Evaluation

To execute the evaluation, use the following command:

NODE_OPTIONS='--import @swc-node/register/esm-register' promptfoo eval -c examples/ts-config/promptfooconfig.ts

After the evaluation completes, view the results with:

promptfoo view

TypeScript Support in Node.js

Currently, Node.js requires external loaders like @swc-node/register to run TypeScript files directly. However, future versions of Node.js are expected to include native TypeScript support:

• Node.js 20 introduced the --experimental-loader flag for ES modules, marking progress toward native TypeScript support.
• The Node.js team is actively working on enhancing TypeScript integration.
• Once native support is available, the reliance on external loaders may be reduced or eliminated.