@merchantlabs/react-carousel/lib/ResponsiveCarousel.js

Merchant Labs React component library.

'use strict';

exports.__esModule = true;
exports.default = undefined;

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _resizeObserverPolyfill = require('resize-observer-polyfill');

var _resizeObserverPolyfill2 = _interopRequireDefault(_resizeObserverPolyfill);

var _InfiniteCarousel = require('./InfiniteCarousel');

var _InfiniteCarousel2 = _interopRequireDefault(_InfiniteCarousel);

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

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

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 ResponsiveCarousel = function (_Component) {
  _inherits(ResponsiveCarousel, _Component);

  function ResponsiveCarousel(props) {
    _classCallCheck(this, ResponsiveCarousel);

    var _this = _possibleConstructorReturn(this, _Component.call(this, props));

    _this.updateMatches = function () {
      var itemCount = _this.state.itemCount;
      var breakpoints = _this.props.breakpoints;


      var carouselSize = 0;

      if (_this.carouselContainer) {
        carouselSize = _this.carouselContainer.getBoundingClientRect().width;
      }

      var count = breakpoints.reduce(function (acc, item) {
        return carouselSize > item.width ? item.items : acc;
      }, 1);

      if (itemCount !== count) {
        _this.setState({ itemCount: count });
      }
    };

    _this.state = { itemCount: 1 };
    _this.carouselContainer = null;
    return _this;
  }

  ResponsiveCarousel.prototype.componentDidMount = function componentDidMount() {
    var _this2 = this;

    if (typeof window !== 'undefined') {
      this.updateMatches();
      this.observer = new _resizeObserverPolyfill2.default(function () {
        return _this2.updateMatches();
      });
      this.observer.observe(this.carouselContainer);
      window.addEventListener('resize', this.updateMatches);
    }
  };

  ResponsiveCarousel.prototype.componentWillUnmount = function componentWillUnmount() {
    window.removeEventListener('resize', this.updateMatches);
    this.observer.disconnect();
  };

  ResponsiveCarousel.prototype._chunkArray = function _chunkArray(array, size) {
    return array.reduce(function (acc, item, index, arr) {
      return index % size === 0 ? acc.concat([arr.slice(index, index + size)]) : acc;
    }, []);
  };

  ResponsiveCarousel.prototype.render = function render() {
    var _this3 = this;

    var itemCount = this.state.itemCount;

    var _props = this.props,
        breakpoints = _props.breakpoints,
        slides = _props.slides,
        restProps = _objectWithoutProperties(_props, ['breakpoints', 'slides']);

    var chunkedSlides = this._chunkArray(slides, itemCount);

    return _react2.default.createElement(_InfiniteCarousel2.default, _extends({
      innerRef: function innerRef(x) {
        return _this3.carouselContainer = x;
      },
      slides: chunkedSlides
    }, restProps));
  };

  return ResponsiveCarousel;
}(_react.Component);

exports.default = ResponsiveCarousel;
ResponsiveCarousel.propTypes = process.env.NODE_ENV !== "production" ? _extends({
  slides: _propTypes2.default.array.isRequired,
  breakpoints: _propTypes2.default.array.isRequired
}, _InfiniteCarousel2.default.propTypes) : {};
module.exports = exports['default'];