如何修复React forwardRef(Menu)材质用户界面? [英] Ho to fix React forwardRef(Menu) Material UI?

问题描述

我创建了非常简单的自定义组件 MuiMenu 和 MuiMenuItem .但是当我显示这些组件时，我看到一个错误:

I created very simple custom components MuiMenu and MuiMenuItem. But when I displaying these components I see an error:

Function components cannot be given refs. Attempts to access this ref will fail. Did you mean to use React.forwardRef()?

Check the render method of `ForwardRef(Menu)`.

但是，如果我直接从 @ material-ui/core 导入-一切都很好.如何解决?

But if I import directly form @material-ui/core - all is well. How to fix it?

工作示例: https://codesandbox.io/s/sharp-shadow-bt404?file =/src/App.js

推荐答案

正如错误所言，Material-UI正在使用ForwardRef，您需要在代码中包括它.下面是对MuiMenu和MuiMenuItem组件的修复；

As the error says, Material-UI is using ForwardRef and you need to include that in your code. Below is a fix to your MuiMenu and MuiMenuItem Components;

MuiMenu

import React from "react";
import Menu from "@material-ui/core/Menu";


const MuiMenu = React.forwardRef((props, ref) => {
  return <Menu  ref={ref} {...props} />;
});

export default MuiMenu;

MuiMenuItem

import React from "react";
import MenuItem from "@material-ui/core/MenuItem";

const MuiMenuItem = React.forwardRef((props, ref) => {
  return <MenuItem  ref={ref} {...props} />;
});

export default MuiMenuItem;

此外，您在索引中使用的strictmode出现错误，因此我将其删除.

Also there was an error with the strictmode you used at index so I removed it.

Index.JS

import React from "react";
import ReactDOM from "react-dom";

import App from "./App";

const rootElement = document.getElementById("root");
ReactDOM.render(
    <App />,
  rootElement
);

这是固定沙箱的链接: https://codesandbox.io/s/hopeful-thunder-u6m2k

here is a link to the fixed sandbox: https://codesandbox.io/s/hopeful-thunder-u6m2k

还有其他链接可以帮助您了解更多信息: https://material-ui.com/getting-started/faq/#how-do-i-use-react-router | https://reactjs.org/docs/react-api.html#reactforwardref

And here are other links to help you understand a bit more: https://material-ui.com/getting-started/faq/#how-do-i-use-react-router | https://reactjs.org/docs/react-api.html#reactforwardref

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