Monthly Downloads: 0
Programming language: JavaScript
License: MIT License
Latest version: v5.1.1

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React Visibility Sensor

Build Status

Sensor component for React that notifies you when it goes in or out of the window viewport.

Sponsored by X-Team


npm install react-visibility-sensor

Including the script directly

Useful if you want to use with bower, or in a plain old <script> tag.

In this case, make sure that React and ReactDOM are already loaded and globally accessible.

Take a look at the [umd example](./example-umd/) to see this in action


View an example on codesandbox

Or if you'd like to try building an example yourself locally, here's another:

View the example

To run the example locally:

  • npm run build-example
  • open example/index.html in a browser

General usage goes something like:

const VisibilitySensor = require('react-visibility-sensor');

function onChange (isVisible) {
  console.log('Element is now %s', isVisible ? 'visible' : 'hidden');

function MyComponent (props) {
  return (
    <VisibilitySensor onChange={onChange}>
      <div>...content goes here...</div>

You can also pass a child function, which can be convenient if you don't need to store the visibility anywhere:

function MyComponent (props) {
  return (
      {({isVisible}) =>
        <div>I am {isVisible ? 'visible' : 'invisible'}</div>


  • onChange: callback for whenever the element changes from being within the window viewport or not. Function is called with 1 argument (isVisible: boolean)
  • active: (default true) boolean flag for enabling / disabling the sensor. When active !== true the sensor will not fire the onChange callback.
  • partialVisibility: (default false) consider element visible if only part of it is visible. Also possible values are - 'top', 'right', 'bottom', 'left' - in case it's needed to detect when one of these become visible explicitly.
  • offset: (default {}) with offset you can define amount of px from one side when the visibility should already change. So in example setting offset={{top:10}} means that the visibility changes hidden when there is less than 10px to top of the viewport. Offset works along with partialVisibility
  • minTopValue: (default 0) consider element visible if only part of it is visible and a minimum amount of pixels could be set, so if at least 100px are in viewport, we mark element as visible.
  • intervalCheck: (default true) when this is true, it gives you the possibility to check if the element is in view even if it wasn't because of a user scroll
  • intervalDelay: (default 100) integer, number of milliseconds between checking the element's position in relation the the window viewport. Making this number too low will have a negative impact on performance.
  • scrollCheck: (default: false) by making this true, the scroll listener is enabled.
  • scrollDelay: (default: 250) is the debounce rate at which the check is triggered. Ex: 250ms after the user stopped scrolling.
  • scrollThrottle: (default: -1) by specifying a value > -1, you are enabling throttle instead of the delay to trigger checks on scroll event. Throttle supercedes delay.
  • resizeCheck: (default: false) by making this true, the resize listener is enabled. Resize listener only listens to the window.
  • resizeDelay: (default: 250) is the debounce rate at which the check is triggered. Ex: 250ms after the user stopped resizing.
  • resizeThrottle: (default: -1) by specifying a value > -1, you are enabling throttle instead of the delay to trigger checks on resize event. Throttle supercedes delay.
  • containment: (optional) element to use as a viewport when checking visibility. Default behaviour is to use the browser window as viewport.
  • delayedCall: (default false) if is set to true, wont execute on page load ( prevents react apps triggering elements as visible before styles are loaded )
  • children: can be a React element or a function. If you provide a function, it will be called with 1 argument {isVisible: ?boolean, visibilityRect: Object}

It's possible to use both intervalCheck and scrollCheck together. This means you can detect most visibility changes quickly with scrollCheck, and an intervalCheck with a higher intervalDelay will act as a fallback for other visibility events, such as resize of a container.


Special thanks to contributors



*Note that all licence references and agreements mentioned in the react-visibility-sensor README section above are relevant to that project's source code only.