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A JavaScript library for measuring First Input Delay (FID) in the browser.

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Hi, can it work without GA? Maybe a console log? I really don't want to add google analytics it's pretty heavy on it's own, which kills the purpose of optimizing.

The readme says to use the script at `dist/first-input-delay.js`, that file doesn't exist, I think it's meant to be `dist/first-input-delay.min.js`. Also consider setting the package `main` field to the minified...

We have instrumented FID measurements using this Polyfill. We are seeing 5x-10x differences between iOS/Safari vs Android/Chrome. For example, for one of the most visited pages on our site we...

# Headless test using puppeteer Created a basic node server which serves an index.html file. First-Input-delay.js file added to its head. Puppeteer loads this file & triggers `mousedown` event. ##...

## Cross browser testing? Does it make sense to add cross browser testing to this module? Maybe something using [Saucelabs](https://saucelabs.com/)? I will be happy to make a pull request if...