Function Transition

app/src/static/js/react-bootstrap.js:784–814

(props, context)

  _inheritsLoose(Transition, _React$Component);

  function Transition(props, context) {
    var _this;

    _this = _React$Component.call(this, props, context) || this;
    var parentGroup = context.transitionGroup; // In the context of a TransitionGroup all enters are really appears

    var appear = parentGroup && !parentGroup.isMounting ? props.enter : props.appear;
    var initialStatus;
    _this.appearStatus = null;

    if (props.in) {
      if (appear) {
        initialStatus = EXITED;
        _this.appearStatus = ENTERING;
      } else {
        initialStatus = ENTERED;
      }
    } else {
      if (props.unmountOnExit || props.mountOnEnter) {
        initialStatus = UNMOUNTED;
      } else {
        initialStatus = EXITED;
      }
    }

    _this.state = {
      status: initialStatus
    };
    _this.nextCallback = null;
    return _this;
  }

  var _proto = Transition.prototype;