@material-ui/core/es/Backdrop/Backdrop.js

import _extends from "@babel/runtime/helpers/esm/extends";
import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
import * as React from 'react';
import PropTypes from 'prop-types';
import clsx from 'clsx';
import withStyles from '../styles/withStyles';
import Fade from '../Fade';
export const styles = {
  /* Styles applied to the root element. */
  root: {
    // Improve scrollable dialog support.
    zIndex: -1,
    position: 'fixed',
    display: 'flex',
    alignItems: 'center',
    justifyContent: 'center',
    right: 0,
    bottom: 0,
    top: 0,
    left: 0,
    backgroundColor: 'rgba(0, 0, 0, 0.5)',
    WebkitTapHighlightColor: 'transparent'
  },

  /* Styles applied to the root element if `invisible={true}`. */
  invisible: {
    backgroundColor: 'transparent'
  }
};
const Backdrop = /*#__PURE__*/React.forwardRef(function Backdrop(props, ref) {
  const {
    children,
    classes,
    className,
    invisible = false,
    open,
    transitionDuration,
    // eslint-disable-next-line react/prop-types
    TransitionComponent = Fade
  } = props,
        other = _objectWithoutPropertiesLoose(props, ["children", "classes", "className", "invisible", "open", "transitionDuration", "TransitionComponent"]);

  return /*#__PURE__*/React.createElement(TransitionComponent, _extends({
    in: open,
    timeout: transitionDuration
  }, other), /*#__PURE__*/React.createElement("div", {
    className: clsx(classes.root, className, invisible && classes.invisible),
    "aria-hidden": true,
    ref: ref
  }, children));
});
process.env.NODE_ENV !== "production" ? Backdrop.propTypes = {
  // ----------------------------- Warning --------------------------------
  // | These PropTypes are generated from the TypeScript type definitions |
  // |     To update them edit the d.ts file and run "yarn proptypes"     |
  // ----------------------------------------------------------------------

  /**
   * The content of the component.
   */
  children: PropTypes.node,

  /**
   * Override or extend the styles applied to the component.
   * See [CSS API](#css) below for more details.
   */
  classes: PropTypes.object,

  /**
   * @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({
    appear: PropTypes.number,
    enter: PropTypes.number,
    exit: PropTypes.number
  })])
} : void 0;
export default withStyles(styles, {
  name: 'MuiBackdrop'
})(Backdrop);