@mui/material/modern/Fade/Fade.js

import _extends from "@babel/runtime/helpers/esm/extends";
import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
const _excluded = ["addEndListener", "appear", "children", "easing", "in", "onEnter", "onEntered", "onEntering", "onExit", "onExited", "onExiting", "style", "timeout", "TransitionComponent"];
import * as React from 'react';
import PropTypes from 'prop-types';
import { Transition } from 'react-transition-group';
import { elementAcceptingRef } from '@mui/utils';
import useTheme from '../styles/useTheme';
import { reflow, getTransitionProps } from '../transitions/utils';
import useForkRef from '../utils/useForkRef';
import { jsx as _jsx } from "react/jsx-runtime";
const styles = {
  entering: {
    opacity: 1
  },
  entered: {
    opacity: 1
  }
};
/**
 * The Fade transition is used by the [Modal](/material-ui/react-modal/) component.
 * It uses [react-transition-group](https://github.com/reactjs/react-transition-group) internally.
 */

const Fade = /*#__PURE__*/React.forwardRef(function Fade(props, ref) {
  const theme = useTheme();
  const defaultTimeout = {
    enter: theme.transitions.duration.enteringScreen,
    exit: theme.transitions.duration.leavingScreen
  };

  const {
    addEndListener,
    appear = true,
    children,
    easing,
    in: inProp,
    onEnter,
    onEntered,
    onEntering,
    onExit,
    onExited,
    onExiting,
    style,
    timeout = defaultTimeout,
    // eslint-disable-next-line react/prop-types
    TransitionComponent = Transition
  } = props,
        other = _objectWithoutPropertiesLoose(props, _excluded);

  const enableStrictModeCompat = true;
  const nodeRef = React.useRef(null);
  const foreignRef = useForkRef(children.ref, ref);
  const handleRef = useForkRef(nodeRef, foreignRef);

  const normalizedTransitionCallback = callback => maybeIsAppearing => {
    if (callback) {
      const node = nodeRef.current; // onEnterXxx and onExitXxx callbacks have a different arguments.length value.

      if (maybeIsAppearing === undefined) {
        callback(node);
      } else {
        callback(node, maybeIsAppearing);
      }
    }
  };

  const handleEntering = normalizedTransitionCallback(onEntering);
  const handleEnter = normalizedTransitionCallback((node, isAppearing) => {
    reflow(node); // So the animation always start from the start.

    const transitionProps = getTransitionProps({
      style,
      timeout,
      easing
    }, {
      mode: 'enter'
    });
    node.style.webkitTransition = theme.transitions.create('opacity', transitionProps);
    node.style.transition = theme.transitions.create('opacity', transitionProps);

    if (onEnter) {
      onEnter(node, isAppearing);
    }
  });
  const handleEntered = normalizedTransitionCallback(onEntered);
  const handleExiting = normalizedTransitionCallback(onExiting);
  const handleExit = normalizedTransitionCallback(node => {
    const transitionProps = getTransitionProps({
      style,
      timeout,
      easing
    }, {
      mode: 'exit'
    });
    node.style.webkitTransition = theme.transitions.create('opacity', transitionProps);
    node.style.transition = theme.transitions.create('opacity', transitionProps);

    if (onExit) {
      onExit(node);
    }
  });
  const handleExited = normalizedTransitionCallback(onExited);

  const handleAddEndListener = next => {
    if (addEndListener) {
      // Old call signature before `react-transition-group` implemented `nodeRef`
      addEndListener(nodeRef.current, next);
    }
  };

  return /*#__PURE__*/_jsx(TransitionComponent, _extends({
    appear: appear,
    in: inProp,
    nodeRef: enableStrictModeCompat ? nodeRef : undefined,
    onEnter: handleEnter,
    onEntered: handleEntered,
    onEntering: handleEntering,
    onExit: handleExit,
    onExited: handleExited,
    onExiting: handleExiting,
    addEndListener: handleAddEndListener,
    timeout: timeout
  }, other, {
    children: (state, childProps) => {
      return /*#__PURE__*/React.cloneElement(children, _extends({
        style: _extends({
          opacity: 0,
          visibility: state === 'exited' && !inProp ? 'hidden' : undefined
        }, styles[state], style, children.props.style),
        ref: handleRef
      }, childProps));
    }
  }));
});
process.env.NODE_ENV !== "production" ? Fade.propTypes
/* remove-proptypes */
= {
  // ----------------------------- Warning --------------------------------
  // | These PropTypes are generated from the TypeScript type definitions |
  // |     To update them edit the d.ts file and run "yarn proptypes"     |
  // ----------------------------------------------------------------------

  /**
   * Add a custom transition end trigger. Called with the transitioning DOM
   * node and a done callback. Allows for more fine grained transition end
   * logic. Note: Timeouts are still used as a fallback if provided.
   */
  addEndListener: PropTypes.func,

  /**
   * Perform the enter transition when it first mounts if `in` is also `true`.
   * Set this to `false` to disable this behavior.
   * @default true
   */
  appear: PropTypes.bool,

  /**
   * A single child content element.
   */
  children: elementAcceptingRef.isRequired,

  /**
   * The transition timing function.
   * You may specify a single easing or a object containing enter and exit values.
   */
  easing: PropTypes.oneOfType([PropTypes.shape({
    enter: PropTypes.string,
    exit: PropTypes.string
  }), PropTypes.string]),

  /**
   * If `true`, the component will transition in.
   */
  in: PropTypes.bool,

  /**
   * @ignore
   */
  onEnter: PropTypes.func,

  /**
   * @ignore
   */
  onEntered: PropTypes.func,

  /**
   * @ignore
   */
  onEntering: PropTypes.func,

  /**
   * @ignore
   */
  onExit: PropTypes.func,

  /**
   * @ignore
   */
  onExited: PropTypes.func,

  /**
   * @ignore
   */
  onExiting: PropTypes.func,

  /**
   * @ignore
   */
  style: PropTypes.object,

  /**
   * The duration for the transition, in milliseconds.
   * You may specify a single timeout for all transitions, or individually with an object.
   * @default {
   *   enter: theme.transitions.duration.enteringScreen,
   *   exit: theme.transitions.duration.leavingScreen,
   * }
   */
  timeout: PropTypes.oneOfType([PropTypes.number, PropTypes.shape({
    appear: PropTypes.number,
    enter: PropTypes.number,
    exit: PropTypes.number
  })])
} : void 0;
export default Fade;