inp-lab-test

Automation to run interactions on your pages multiple times therefore getting a more reliable INP and TBT numbers

Getting started

npm i --save-dev inp-lab-test

Create a js file with the name you want (a suggestion is pagename-interactionScenario.js) and paste the following code

const { startAutomation } = require('inp-lab-test');

const navigationCallback = async (runner) => {};

const interactionsCallback = async (runner) => {};

startAutomation({
  navigationCallback,
  interactionsCallback,
});

Then:

• Go to your website in the page you wanna test
• Open Chrome Devtools
• Go to the experimental Recorder tab (it might be hidden under the 3 dots > more tools)
• Start recording
• Do all the interactions you want on your page
• Stop Recording
• Click on dowload icon (the arrow down icon)
• Select @puppeteer/replay
• Open the file you just downloaded
• Copy the first 2 runner.runStep (the ones for setting viewport and navigating) and paste them inside navigationCallback
• Copy the rest of the runner.runStep and paste them inside interactionsCallback
• Run node yourFileName.js

API

Functions

startAutomation()

type startAutomation = (options: StartAutomationOptions) => void;

Types

PuppeteerReplayRunner

Check docs for this on puppeteer/replay repo

StartAutomationOptions

interface StartAutomationOptions {
  navigationCallback: (runner: PuppeteerReplayRunner) => {};
  interactionsCallback: (runner: PuppeteerReplayRunner) => {};
  samplesAmount?: number; // defaults to 10
  CPUThrottling?: number; // defaults to 12
  debug?: boolean; // defaults to false
}