react-media/lib/Media.js

A CSS media query component for React

'use strict';

exports.__esModule = true;

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

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; }

var Media = function (_React$Component) {
  _inherits(Media, _React$Component);

  function Media() {
    var _temp, _this, _ret;

    _classCallCheck(this, Media);

    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    return _ret = (_temp = (_this = _possibleConstructorReturn(this, _React$Component.call.apply(_React$Component, [this].concat(args))), _this), _this.state = {
      matches: true
    }, _this.updateMatches = function () {
      return _this.setState({ matches: _this.mediaQueryList.matches });
    }, _temp), _possibleConstructorReturn(_this, _ret);
  }

  Media.prototype.componentWillMount = function componentWillMount() {
    if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object') {
      this.mediaQueryList = window.matchMedia(this.props.query);
      this.mediaQueryList.addListener(this.updateMatches);
      this.updateMatches();
    }
  };

  Media.prototype.componentWillUnmount = function componentWillUnmount() {
    this.mediaQueryList.removeListener(this.updateMatches);
  };

  Media.prototype.render = function render() {
    var _props = this.props;
    var children = _props.children;
    var render = _props.render;
    var matches = this.state.matches;


    if (matches && render) return render();

    if (typeof children === 'function') return children(matches);

    return matches ? _react2.default.Children.only(children) : null;
  };

  return Media;
}(_react2.default.Component);

Media.propTypes = {
  query: _react.PropTypes.string.isRequired,
  render: _react.PropTypes.func,
  children: _react.PropTypes.oneOfType([_react.PropTypes.node, _react.PropTypes.func])
};
exports.default = Media;