In the root level of your testing folder, install the @axe-core/watcher package and all of its dependencies using npm or your preferred package manager (for example, yarn or pnpm).

npm install --save-dev @axe-core/watcher

In your test file or files, import the puppeteerConfig() function, the wrapPuppeteer() function, and the PuppeteerController class from @axe-core/watcher/puppeteer:

import {
  puppeteerConfig,
  wrapPuppeteerPage,
  PuppeteerController
} from '@axe-core/watcher/puppeteer'

Update your test setup code (typically in a before or beforeAll block) by wrapping any existing code for creating a browser instance with a call to puppeteerConfig(), while obtaining your API key from the environment (as ACCESSIBILITY_API_KEY):

// Original code:

browser = await puppeteer.launch({
  // Your existing launch options...
})

// Becomes:

const ACCESSIBILITY_API_KEY = process.env.ACCESSIBILITY_API_KEY
const PROJECT_ID = process.env.PROJECT_ID

const browser = await puppeteer.launch(
  puppeteerConfig({
    axe: {
      apiKey: ACCESSIBILITY_API_KEY,
      projectId: PROJECT_ID
    },
    headless: false
  })
);

Be sure to set ACCESSIBILITY_API_KEY and PROJECT_ID in your environment to your personal API key (found in your axe Account, API KEYS tab) and your project ID (shown at the top of these instructions when you created your project or available from the Projects page by choosing Configure project under Settings).

Create an instance of PuppeteerController and wrap your Puppeteer browserContext:

// Create a page instance, using your browser instance.
let page = await browser.newPage()

// Initialize the PuppeteerController by passing in the Puppeteer page.
const controller = new PuppeteerController(page)

// Use the new wrapped Puppeteer page instance.
page = wrapPuppeteerPage(page, controller)

Finally, ensure all test results from axe Watcher are flushed out. To do this, add the following block of code to your test teardown code (typically in an afterEach block):

afterEach(async () => {
  await controller.flush()
});