import _extends from "@babel/runtime/helpers/builtin/extends";
import _objectWithoutProperties from "@babel/runtime/helpers/builtin/objectWithoutProperties";
import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import withStyles from '../styles/withStyles';
import Fade from '../Fade';
export const styles = {
  root: {
    zIndex: -1,
    width: '100%',
    height: '100%',
    position: 'fixed',
    top: 0,
    left: 0,
    // Remove grey highlight
    WebkitTapHighlightColor: 'transparent',
    backgroundColor: 'rgba(0, 0, 0, 0.5)'
  },
  invisible: {
    backgroundColor: 'transparent'
  }
};

function Backdrop(props) {
  const {
    classes,
    className,
    invisible,
    open,
    transitionDuration
  } = props,
        other = _objectWithoutProperties(props, ["classes", "className", "invisible", "open", "transitionDuration"]);

  return React.createElement(Fade, _extends({
    appear: true,
    "in": open,
    timeout: transitionDuration
  }, other), React.createElement("div", {
    className: classNames(classes.root, {
      [classes.invisible]: invisible
    }, className),
    "aria-hidden": "true"
  }));
}

Backdrop.propTypes = process.env.NODE_ENV !== "production" ? {
  /**
   * Override or extend the styles applied to the component.
   * See [CSS API](#css-api) below for more details.
   */
  classes: PropTypes.object.isRequired,

  /**
   * @ignore
   */
  className: PropTypes.string,

  /**
   * If `true`, the backdrop is invisible.
   * It can be used when rendering a popover or a custom select component.
   */
  invisible: PropTypes.bool,

  /**
   * If `true`, the backdrop is open.
   */
  open: PropTypes.bool.isRequired,

  /**
   * The duration for the transition, in milliseconds.
   * You may specify a single timeout for all transitions, or individually with an object.
   */
  transitionDuration: PropTypes.oneOfType([PropTypes.number, PropTypes.shape({
    enter: PropTypes.number,
    exit: PropTypes.number
  })])
} : {};
Backdrop.defaultProps = {
  invisible: false
};
export default withStyles(styles, {
  name: 'MuiBackdrop'
})(Backdrop);