​​quicklink - (★ 2,981) is faster subsequent page-loads by prefetching in-viewport links during idle time.

Quicklink attempts to make navigations to subsequent pages load faster. It:

● Detects links within the viewport (using Intersection Observer)
● Waits until the browser is idle (using requestIdleCallback)
● Checks if the user isn't on a slow connection (using navigator.connection.effectiveType) or has data-saver enabled (using navigator.connection.saveData)
● Prefetches URLs to the links (using <link rel=prefetch> or XHR). Provides some control over the request priority (can switch to fetch() if supported).

#js #performance #labs