useScrollNavigation

A React Hook for getting the first visible element in a scrollable container

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Installation

Package can be added using yarn:

yarn add use-scroll-navigation

Or, use NPM:

npm install use-scroll-navigation

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API Documentation

The useScrollNavigation hook takes an object with at most three properties:

Name	Value
scrollableTargets	HTMLElement[]
scrollableContainer	?EventTarget = window
offsetTop	?number = 0

• scrollableTargets is an array of HTMLElements which you want to sync with the user scroll position.
• scrollableContainer is the scrollable element for which you want to monitor scroll events. Defaults to 'window'.
• offsetTop is a number which will be added in the computation of the top offsets for each target. Useful for compensating position: fixed elements (e.g. an app bar) at the top of the container which don't contribute directly to the container's height. Defaults to 0.

Exposed Data

The hook produces an object with the following fields:

Name	Value
hitTargetIndex	number
scrollTo	(targetIndex: number, options?: ScrollToOptions) => void

• hitTargetIndex is the first visible (top to bottom) element in the container.
• scrollTo is offered as a replacement of the equivalent browser API. It automatically handles scrolling to unreachable targets.