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react-visibility-sensor

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react-visibility-sensor

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

5.1.1
latest
Source
npm
Version published
Weekly downloads
194K
-8.12%
Maintainers
4
Weekly downloads
 
Created

What is react-visibility-sensor?

The react-visibility-sensor package is a React component that allows you to detect when a component is visible on the screen. This can be useful for lazy loading images, triggering animations, or tracking user interactions.

What are react-visibility-sensor's main functionalities?

Basic Visibility Detection

This feature allows you to detect when a component becomes visible or hidden. The `onChange` callback is triggered with a boolean value indicating the visibility state.

```jsx
import React from 'react';
import VisibilitySensor from 'react-visibility-sensor';

class MyComponent extends React.Component {
  onChange = (isVisible) => {
    console.log('Element is now %s', isVisible ? 'visible' : 'hidden');
  };

  render() {
    return (
      <VisibilitySensor onChange={this.onChange}>
        <div>
          This is my content
        </div>
      </VisibilitySensor>
    );
  }
}

export default MyComponent;
```

Partial Visibility Detection

This feature allows you to detect partial visibility of a component. By setting the `partialVisibility` prop, the `onChange` callback will be triggered even if only part of the component is visible.

```jsx
import React from 'react';
import VisibilitySensor from 'react-visibility-sensor';

class MyComponent extends React.Component {
  onChange = (isVisible) => {
    console.log('Element is now %s', isVisible ? 'visible' : 'hidden');
  };

  render() {
    return (
      <VisibilitySensor onChange={this.onChange} partialVisibility>
        <div>
          This is my content
        </div>
      </VisibilitySensor>
    );
  }
}

export default MyComponent;
```

Delayed Visibility Detection

This feature allows you to add a delay before the visibility change is detected. By setting the `delay` prop, the `onChange` callback will be triggered after the specified delay in milliseconds.

```jsx
import React from 'react';
import VisibilitySensor from 'react-visibility-sensor';

class MyComponent extends React.Component {
  onChange = (isVisible) => {
    console.log('Element is now %s', isVisible ? 'visible' : 'hidden');
  };

  render() {
    return (
      <VisibilitySensor onChange={this.onChange} delay={500}>
        <div>
          This is my content
        </div>
      </VisibilitySensor>
    );
  }
}

export default MyComponent;
```

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Keywords

react

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Package last updated on 25 Jul 2019

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