尝试使用react-redux的“连接”功能时收到以下错误:
"TypeError: react__WEBPACK_IMPORTED_MODULE_4___default.a.memo is not a function"
还有以下详细信息:
wrapWithConnect
C:/.../node_modules/react-redux/es/components/connectAdvanced.js:325
322 | } // If we're in "pure" mode, ensure our wrapper component only re-renders when incoming props have changed.
323 |
324 |
> 325 | var Connect = pure ? React.memo(ConnectFunction) : ConnectFunction;
| ^ 326 | Connect.WrappedComponent = WrappedComponent;
327 | Connect.displayName = displayName;
328 |
我没有找到与此错误相关的任何参考。
这是我在“ Chat.js”类末尾与“ connect”一起使用的代码:
import { connect } from 'react-redux';
...
const mapStateToProps = state => ({
...state
});
const mapDispatchToProps = dispatch => ({
addMessage: () => dispatch(addMessage)
});
export default connect(
mapStateToProps,
mapDispatchToProps
)(Chat);
在名为“ Chat.js”的类中使用此编码,当使用“导出默认聊天”而不使用redux“连接”时,一切正常。
我将provider标记用作“ App.js”中聊天组件的包装:
import { Provider } from 'react-redux';
const App = class extends React.PureComponent {
render() {
const { title } = this.context;
return (
<div className="center-screen">
{title}
<Provider store={configureStore()}>
<Chatroom />
</Provider>
</div>
);
}
};
操作:
export function addMessage(text) {
return { type: 'addMessage', text };
}
减速器:
export default (state, action) => {
switch (action.type) {
case 'addMessage':
return {
text: action.text
};
default:
return state;
}
};
答案 0 :(得分:0)
也共享webpack文件。这样我就可以检查webpack设置中是否存在任何问题