what is fastclick fr?

FastClick is a small JavaScript library that eliminates the 300-millisecond delay between a user tapping a touchscreen and a click event firing on mobile browsers. The delay exists because mobile browsers historically waited to see whether a tap was the first of a double-tap before registering it as a single click. The readme explicitly warns that as of late 2015, most modern mobile browsers, notably Chrome and Safari, no longer have this delay, so FastClick provides no benefit on newer browsers and may actually introduce bugs. It is primarily relevant for supporting older mobile browser versions. FastClick works by listening for touchend events and immediately firing a synthetic click event, bypassing the browser's built-in delay. It does not attach any listeners on desktop browsers. It can be used on specific elements or attached to the entire document body. If certain elements need the native (non-synthetic) click behavior, you can exempt them by adding a needsclick CSS class. It is developed by FT Labs, part of the Financial Times. The library is available through npm and other package managers, and an AMD version is provided for asynchronous module loading. All code released by FT Labs is under the MIT license.