Running Lighthouse in Typescript Github Action

[pascalknupper]

I´m trying to run Lighthouse programmatically in a custom TypeScript GitHub Action. Unfortunately I cannot get it running after bundling with ncc.

After bundling via npx ncc build src/index.ts -o dist --source-map I run into an issue when running the index.js.

Also I see issues when running the jest tests

SyntaxError: Cannot use import statement outside a module

    > 1 | import lighthouse from 'lighthouse'
        | ^
      2 | import { launch } from 'puppeteer'
      3 |
      4 | export async function runLighthouse(): Promise<void> {

      at Runtime.createScriptFromCode (node_modules/jest-runtime/build/index.js:1505:14)
      at Object.require (src/lighthouse.ts:1:1)
      at Object.require (src/main.ts:2:1)
      at Object.<anonymous> (__tests__/index.test.ts:5:1)

Error: ENOENT: no such file or directory, open '/home/runner/work/lighthouse-demo-action/lighthouse-demo-action/dist/locales/ar.json'
    at Object.readFileSync (node:fs:448:20)
    at Object.41812 (file:///home/runner/work/lighthouse-demo-action/lighthouse-demo-action/node_modules/lighthouse/shared/localization/locales.js:[3](https://github.com/pascalknupper/lighthouse-demo-action/actions/runs/10089178347/job/27896189514#step:3:4)5:1)
    at __nccwpck_require__ (file:///home/runner/work/lighthouse-demo-action/lighthouse-demo-action/webpack/bootstrap:21:1)
    at file:///home/runner/work/lighthouse-demo-action/lighthouse-demo-action/webpack/startup:[4](https://github.com/pascalknupper/lighthouse-demo-action/actions/runs/10089178347/job/27896189514#step:3:5):1
    at ModuleJob.run (node:internal/modules/esm/module_job:222:25)
    at ModuleLoader.import (node:internal/modules/esm/loader:316:24)
    at asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:123:[5](https://github.com/pascalknupper/lighthouse-demo-action/actions/runs/10089178347/job/27896189514#step:3:6))

How do I use the lighthouse npm package correctly in a TypeScript GitHub Action?

This is my demo GitHub Action https://github.com/pascalknupper/lighthouse-demo-action

[connorjclark]

Closing as out of scope for us, I think.

It does look like the issue may be that your entry point itself is not a module - do you need a package.json that says "type": "module"?

Good luck.