react-bootstrap/es/Fade.js

import _extends from 'babel-runtime/helpers/extends';
import _objectWithoutProperties from 'babel-runtime/helpers/objectWithoutProperties';
import _classCallCheck from 'babel-runtime/helpers/classCallCheck';
import _possibleConstructorReturn from 'babel-runtime/helpers/possibleConstructorReturn';
import _inherits from 'babel-runtime/helpers/inherits';

var _fadeStyles;

import classNames from 'classnames';
import React from 'react';
import PropTypes from 'prop-types';
import Transition, { ENTERED, ENTERING } from 'react-transition-group/Transition';

var propTypes = {
  /**
   * Show the component; triggers the fade in or fade out animation
   */
  in: PropTypes.bool,

  /**
   * Wait until the first "enter" transition to mount the component (add it to the DOM)
   */
  mountOnEnter: PropTypes.bool,

  /**
   * Unmount the component (remove it from the DOM) when it is faded out
   */
  unmountOnExit: PropTypes.bool,

  /**
   * Run the fade in animation when the component mounts, if it is initially
   * shown
   */
  appear: PropTypes.bool,

  /**
   * Duration of the fade animation in milliseconds, to ensure that finishing
   * callbacks are fired even if the original browser transition end events are
   * canceled
   */
  timeout: PropTypes.number,

  /**
   * Callback fired before the component fades in
   */
  onEnter: PropTypes.func,
  /**
   * Callback fired after the component starts to fade in
   */
  onEntering: PropTypes.func,
  /**
   * Callback fired after the has component faded in
   */
  onEntered: PropTypes.func,
  /**
   * Callback fired before the component fades out
   */
  onExit: PropTypes.func,
  /**
   * Callback fired after the component starts to fade out
   */
  onExiting: PropTypes.func,
  /**
   * Callback fired after the component has faded out
   */
  onExited: PropTypes.func
};

var defaultProps = {
  in: false,
  timeout: 300,
  mountOnEnter: false,
  unmountOnExit: false,
  appear: false
};

var fadeStyles = (_fadeStyles = {}, _fadeStyles[ENTERING] = 'in', _fadeStyles[ENTERED] = 'in', _fadeStyles);

var Fade = function (_React$Component) {
  _inherits(Fade, _React$Component);

  function Fade() {
    _classCallCheck(this, Fade);

    return _possibleConstructorReturn(this, _React$Component.apply(this, arguments));
  }

  Fade.prototype.render = function render() {
    var _props = this.props,
        className = _props.className,
        children = _props.children,
        props = _objectWithoutProperties(_props, ['className', 'children']);

    return React.createElement(
      Transition,
      props,
      function (status, innerProps) {
        return React.cloneElement(children, _extends({}, innerProps, {
          className: classNames('fade', className, children.props.className, fadeStyles[status])
        }));
      }
    );
  };

  return Fade;
}(React.Component);

Fade.propTypes = propTypes;
Fade.defaultProps = defaultProps;

export default Fade;