react-native-scrollable-mixin

ScrollableMixin

ScrollableMixin lets your scrollable React Native components conform to a standard interface, making it easier to compose components. This lets you compose different types of ScrollView-like components while preserving the ScrollView API, including methods like scrollTo.

Installation

npm install react-native-scrollable-mixin

Usage

Add ScrollableMixin to your scrollable React components and implement getScrollResponder(), which must return the underlying scrollable component's scroll responder.

var ScrollableMixin = require('react-native-scrollable-mixin');

var InfiniteScrollView = React.createClass({
  mixins: [ScrollableMixin],

  propTypes: {
    ...ScrollView.propTypes,
    renderScrollComponent: React.PropTypes.func.isRequired,
  },

  /**
   * IMPORTANT: You must return the scroll responder of the underlying
   * scrollable component from getScrollResponder() when using ScrollableMixin.
   */
  getScrollResponder() {
    return this._scrollView.getScrollResponder();
  },

  setNativeProps(props) {
    this._scrollView.setNativeProps(props);
  },

  render() {
    var {
      renderScrollComponent,
      ...props
    } = this.props;
    return React.cloneElement(renderScrollComponent(props), {
      ref: component => {
        this._scrollView = component;
      },
    });
  },
});

Features

By mixing in ScrollableMixin, your custom component gets the ScrollView API. For example:

class App extends React.Component {
  render() {
    return (
      <ListView
        ref={component => this._scrollView = component}
        renderScrollView={props => <InfiniteScrollView {...props} />}
        dataSource={...}
        renderRow={...}
      />
    );
  }

  _scrollToTop() {
    // By having all scrollable components conform to ScrollableMixin's
    // standard, calling `scrollTo` on your top-level scrollable component will
    // successfully scroll the underlying scroll view.
    this._scrollView.scrollTo(0, 0);
  }
}