content: import _extends from "@babel/runtime/helpers/extends";
  import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/objectWithoutPropertiesLoose";
  import React from 'react';
  import PropTypes from 'prop-types';
  import clsx from 'clsx';
  import warning from 'warning';
  import withStyles from '../styles/withStyles';
  export const styles = theme => ({
    /* Styles applied to the root element. */
    root: {
      display: 'flex',
      justifyContent: 'center',
      height: 56,
      backgroundColor: theme.palette.background.paper
    }
  });
  const BottomNavigation = React.forwardRef(function BottomNavigation(props, ref) {
    const {
      children,
      classes,
      className,
      component: Component = 'div',
      onChange,
      showLabels = false,
      value
    } = props,
          other = _objectWithoutPropertiesLoose(props, ["children", "classes", "className", "component", "onChange", "showLabels", "value"]);
  
    return React.createElement(Component, _extends({
      className: clsx(classes.root, className),
      ref: ref
    }, other), React.Children.map(children, (child, childIndex) => {
      if (!React.isValidElement(child)) {
        return null;
      }
  
      process.env.NODE_ENV !== "production" ? warning(child.type !== React.Fragment, ["Material-UI: the BottomNavigation component doesn't accept a Fragment as a child.", 'Consider providing an array instead.'].join('\n')) : void 0;
      const childValue = child.props.value === undefined ? childIndex : child.props.value;
      return React.cloneElement(child, {
        selected: childValue === value,
        showLabel: child.props.showLabel !== undefined ? child.props.showLabel : showLabels,
        value: childValue,
        onChange
      });
    }));
  });
  process.env.NODE_ENV !== "production" ? BottomNavigation.propTypes = {
    /**
     * The content of the component.
     */
    children: PropTypes.node.isRequired,
  
    /**
     * Override or extend the styles applied to the component.
     * See [CSS API](#css) below for more details.
     */
    classes: PropTypes.object.isRequired,
  
    /**
     * @ignore
     */
    className: PropTypes.string,
  
    /**
     * The component used for the root node.
     * Either a string to use a DOM element or a component.
     */
    component: PropTypes.elementType,
  
    /**
     * Callback fired when the value changes.
     *
     * @param {object} event The event source of the callback
     * @param {any} value We default to the index of the child
     */
    onChange: PropTypes.func,
  
    /**
     * If `true`, all `BottomNavigationAction`s will show their labels.
     * By default, only the selected `BottomNavigationAction` will show its label.
     */
    showLabels: PropTypes.bool,
  
    /**
     * The value of the currently selected `BottomNavigationAction`.
     */
    value: PropTypes.any
  } : void 0;
  export default withStyles(styles, {
    name: 'MuiBottomNavigation'
  })(BottomNavigation);