React View Tracker

Simple react component that watch element when enters or leaves the browser viewport.

Demo

Installation

Add react-view-tracker dependency

yarn add react-view-tracker
npm install react-view-tracker --save

Usage

import ViewTracker from 'react-view-tracker'

<ViewTracker
  onShow={(entry)=> {console.log(entry)})}
>
  <Content />
</ViewTracker>

Options

Name	Type	Default	Required	Description
onShow	Function	null	false	When element visible in the view port this function will be called with entry.
onHide	Function	null	false	When element visible then not visible in the view port this function will be called with entry
onStartObserving	Function	null	false	When component did load it will start observing and call this function with container element
onStopObserving	Function	null	false	When component un mount it will stop observing and call this function with container element
setRootContainer	Function	null	false	The Function should return Element that is used as the viewport for checking visibility of the target.
once	boolean	false	false	Only trigger this method once
visiblePercentage	number | number[]	1	false	Number between 0 and 1 indicating the percentage that should be visible before triggering. Can also be an array of numbers, to create multiple trigger points.
offset	object	{left: 0, right: 0, top: 0, bottom: 0}	false	Margin around the root.

License

This project is licensed under the MIT License - see the LICENCE.md file for details