recompact/createSink.js

A set of React high order components based on Rx.

'use strict';

exports.__esModule = true;

var _react = require('react');

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

/**
 * Creates a component that renders nothing (null) but calls a callback when
 * receiving new props.
 *
 * @static
 * @category Utilities
 * @param {Function} callback Function called when new props are received.
 * @returns {ReactClass} Returns a ReactClass.
 * @example
 *
 * const LocationUpdater = createSink(({hash}) => {
 *   window.location.hash = hash;
 * });
 * <LocationUpdater hash="foo" /> // Will add "#foo" in the url
 */
var createSink = function createSink(callback) {
  return function (_Component) {
    _inherits(Sink, _Component);

    function Sink() {
      _classCallCheck(this, Sink);

      return _possibleConstructorReturn(this, _Component.apply(this, arguments));
    }

    Sink.prototype.componentWillMount = function componentWillMount() {
      callback(this.props);
    };

    Sink.prototype.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {
      callback(nextProps);
    };

    Sink.prototype.render = function render() {
      return null;
    };

    return Sink;
  }(_react.Component);
};

exports.default = createSink;