@material-ui/core/esm/Fade/Fade.js

React components that implement Google's Material Design.

import _extends from "@babel/runtime/helpers/esm/extends";
import _objectWithoutProperties from "@babel/runtime/helpers/esm/objectWithoutProperties";
import React from 'react';
import PropTypes from 'prop-types';
import { Transition } from 'react-transition-group';
import { duration } from '../styles/transitions';
import useTheme from '../styles/useTheme';
import { reflow, getTransitionProps } from '../transitions/utils';
import { useForkRef } from '../utils/reactHelpers';
var styles = {
  entering: {
    opacity: 1
  },
  entered: {
    opacity: 1
  }
};
var defaultTimeout = {
  enter: duration.enteringScreen,
  exit: duration.leavingScreen
};
/**
 * The Fade transition is used by the [Modal](/components/modal/) component.
 * It uses [react-transition-group](https://github.com/reactjs/react-transition-group) internally.
 */

var Fade = React.forwardRef(function Fade(props, ref) {
  var children = props.children,
      inProp = props.in,
      onEnter = props.onEnter,
      onExit = props.onExit,
      style = props.style,
      _props$timeout = props.timeout,
      timeout = _props$timeout === void 0 ? defaultTimeout : _props$timeout,
      other = _objectWithoutProperties(props, ["children", "in", "onEnter", "onExit", "style", "timeout"]);

  var theme = useTheme();
  var handleRef = useForkRef(children.ref, ref);

  var handleEnter = function handleEnter(node) {
    reflow(node); // So the animation always start from the start.

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

    if (onEnter) {
      onEnter(node);
    }
  };

  var handleExit = function handleExit(node) {
    var transitionProps = getTransitionProps({
      style: style,
      timeout: timeout
    }, {
      mode: 'exit'
    });
    node.style.webkitTransition = theme.transitions.create('opacity', transitionProps);
    node.style.transition = theme.transitions.create('opacity', transitionProps);

    if (onExit) {
      onExit(node);
    }
  };

  return React.createElement(Transition, _extends({
    appear: true,
    in: inProp,
    onEnter: handleEnter,
    onExit: handleExit,
    timeout: timeout
  }, other), function (state, childProps) {
    return 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 = {
  /**
   * A single child content element.
   */
  children: PropTypes.element,

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

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

  /**
   * @ignore
   */
  onExit: 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.
   */
  timeout: PropTypes.oneOfType([PropTypes.number, PropTypes.shape({
    enter: PropTypes.number,
    exit: PropTypes.number
  })])
} : void 0;
export default Fade;