content: 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; };
  
  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; }
  
  import React from 'react';
  import PropTypes from 'prop-types';
  import invariant from 'invariant';
  
  var isModifiedEvent = function isModifiedEvent(event) {
    return !!(event.metaKey || event.altKey || event.ctrlKey || event.shiftKey);
  };
  
  /**
   * The public API for rendering a history-aware <a>.
   */
  
  var Link = function (_React$Component) {
    _inherits(Link, _React$Component);
  
    function Link() {
      var _temp, _this, _ret;
  
      _classCallCheck(this, Link);
  
      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.handleClick = function (event) {
        if (_this.props.onClick) _this.props.onClick(event);
  
        if (!event.defaultPrevented && // onClick prevented default
        event.button === 0 && // ignore right clicks
        !_this.props.target && // let browser handle "target=_blank" etc.
        !isModifiedEvent(event) // ignore clicks with modifier keys
        ) {
            event.preventDefault();
  
            var history = _this.context.router.history;
            var _this$props = _this.props,
                replace = _this$props.replace,
                to = _this$props.to;
  
  
            if (replace) {
              history.replace(to);
            } else {
              history.push(to);
            }
          }
      }, _temp), _possibleConstructorReturn(_this, _ret);
    }
  
    Link.prototype.render = function render() {
      var _props = this.props,
          replace = _props.replace,
          to = _props.to,
          innerRef = _props.innerRef,
          props = _objectWithoutProperties(_props, ['replace', 'to', 'innerRef']); // eslint-disable-line no-unused-vars
  
      invariant(this.context.router, 'You should not use <Link> outside a <Router>');
  
      var href = this.context.router.history.createHref(typeof to === 'string' ? { pathname: to } : to);
  
      return React.createElement('a', _extends({}, props, { onClick: this.handleClick, href: href, ref: innerRef }));
    };
  
    return Link;
  }(React.Component);
  
  Link.propTypes = {
    onClick: PropTypes.func,
    target: PropTypes.string,
    replace: PropTypes.bool,
    to: PropTypes.oneOfType([PropTypes.string, PropTypes.object]).isRequired,
    innerRef: PropTypes.oneOfType([PropTypes.string, PropTypes.func])
  };
  Link.defaultProps = {
    replace: false
  };
  Link.contextTypes = {
    router: PropTypes.shape({
      history: PropTypes.shape({
        push: PropTypes.func.isRequired,
        replace: PropTypes.func.isRequired,
        createHref: PropTypes.func.isRequired
      }).isRequired
    }).isRequired
  };
  
  
  export default Link;