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 './style.css';

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

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

    return _possibleConstructorReturn(this, _React$Component.apply(this, arguments));
  }

  FootNoteLink.prototype.handleScroll = function handleScroll() {
    var element = document.getElementById('footnotemsg' + this.props.index);
    element.scrollIntoView({ block: 'end', behavior: 'smooth' });
  };

  FootNoteLink.prototype.render = function render() {
    var _this2 = this;

    var index = this.props.index;

    return React.createElement(
      'button',
      {
        className: 'ma__footnote-link footnoteref' + index,
        'aria-describedby': 'footnotemsg' + index,
        'aria-label': 'see footnote ' + index,
        onClick: function onClick() {
          return _this2.handleScroll();
        },
        tabIndex: '0',
        role: 'link'
      },
      React.createElement(
        'span',
        null,
        React.createElement(
          'sup',
          null,
          '[',
          index,
          ']'
        )
      )
    );
  };

  return FootNoteLink;
}(React.Component);

FootNoteLink.propTypes = process.env.NODE_ENV !== "production" ? {
  /** Pair the FootNoteLink molecule with the FootNote. */
  /** The number/index of the footnote item you are referencing. */
  /** If this is the second footnote on the page, `i` would be 2. */
  index: PropTypes.string
} : {};

export default FootNoteLink;