进度条组件，运行过程中报错。

[saymy]

浏览器错误提示：
Uncaught TypeError: Cannot read property 'style' of undefined
componentDidUpdate @ mixin.js?a157:33
measureLifeCyclePerf @ ReactCompositeComponent.js?d2b3:75
(anonymous function) @ ReactCompositeComponent.js?d2b3:729
notifyAll @ CallbackQueue.js?f006:76
ON_DOM_READY_QUEUEING.close @ ReactReconcileTransaction.js?ba2e:80
TransactionImpl.closeAll @ Transaction.js?f15f:206
TransactionImpl.perform @ Transaction.js?f15f:153
TransactionImpl.perform @ Transaction.js?f15f:140
_assign.perform @ ReactUpdates.js?8e6b:89
flushBatchedUpdates @ ReactUpdates.js?8e6b:172
TransactionImpl.closeAll @ Transaction.js?f15f:206
TransactionImpl.perform @ Transaction.js?f15f:153
ReactDefaultBatchingStrategy.batchedUpdates @ ReactDefaultBatchingStrategy.js?e9be:62
enqueueUpdate @ ReactUpdates.js?8e6b:200
enqueueUpdate @ ReactUpdateQueue.js?6531:24
ReactUpdateQueue.enqueueSetState @ ReactUpdateQueue.js?6531:209
ReactComponent.setState @ ReactComponent.js?702a:63
(anonymous function) @ Main.js?1af4:155

找到mixin.js?a157:33 如下：
'use strict';

Object.defineProperty(exports, "__esModule", {
value: true
});

var _react = require('react');

exports["default"] = {
propTypes: {
prefixCls: _react.PropTypes.string,
strokeWidth: _react.PropTypes.oneOfType([_react.PropTypes.number, _react.PropTypes.string]),
strokeColor: _react.PropTypes.string,
trailWidth: _react.PropTypes.oneOfType([_react.PropTypes.number, _react.PropTypes.string]),
trailColor: _react.PropTypes.string,
strokeLinecap: _react.PropTypes.oneOf(['round', 'square']),
style: _react.PropTypes.object,
className: _react.PropTypes.string
},
getDefaultProps: function getDefaultProps() {
return {
prefixCls: 'rc-progress',
strokeWidth: 1,
strokeColor: '#2db7f5',
trailWidth: 1,
trailColor: '#D9D9D9',
strokeLinecap: 'round',
className: ''
};
},
componentDidUpdate: function componentDidUpdate() {
var now = Date.now();
this.path. **style**.transitionDuration = '0.3s, 0.3s';
if (this.prevTimeStamp && now - this.prevTimeStamp < 100) {
this.path.style.transitionDuration = '0s, 0s';
}
this.prevTimeStamp = Date.now();
}
};
module.exports = exports['default'];

[paranoidjk]

can you give a reproducible demo？