%% date:: [[2023-04-27]] parent:: %% # [[First Input Delay (FID)]] [docs](https://web.dev/fid/) FID is the metric from [[Core Web Vitals]] that measures *interactivity*: the amount of time it takes between when a user first performs an action on the page and when the browser starts processing event handlers to respond to the action. FID tries to quantify a user's perception of how responsive or stable a page is. ![[core-web-vitals-fid.png]] [^webdev] [^webdev]: Google. *First Input Delay*. Retrieved on April 27th, 2023 from https://web.dev/fid/