react-context-component/es/withContext.js

This is a React component that lets you add things in the context. Put simply, the [context feature](https://facebook.github.io/react/docs/context.html) basically lets you to pass some data through all nodes in the components tree.

import React from 'react';
import PropTypes from 'prop-types';

var withContext = function withContext() {
  var contextTypes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

  var contextTypeKeys = Object.keys(contextTypes);

  return function (Component) {
    var WithContext = function WithContext(props, context) {
      var mapContextToProps = contextTypeKeys.reduce(function (acc, key) {
        acc[key] = context[key];
        return acc;
      }, {});

      return React.createElement(Component, Object.assign({}, props, mapContextToProps));
    };

    WithContext.contextTypes = contextTypes;

    return WithContext;
  };
};

export default withContext;