如何将 React.createContext() 与反应路由器一起使用？

Question

我正在尝试将 React.createContext() 与 React 路由器一起使用，但目前是不可能的。

const Context = React.createContext()

<Context.Provider value={{ valueTest: 1 }}>
  <HashRouter>
    <Switch>
      <Route
        exact
        path="/"
        render={() => <h1>HelloWorld</h1>} />
    </Switch>
  </HashRouter>
</Context.Provider>

我总是遇到这个错误

未捕获错误：元素类型无效：应为字符串（对于内置组件）或 class/function（对于复合组件）但得到：对象。

有人可以帮助我吗？

Answer 1

渲染上下文值似乎是个问题，以下代码运行良好

index.js

import React from "react";
import { render } from "react-dom";
import { HashRouter, Switch, Route } from "react-router-dom";
import Hello from "./Hello";
import { Context } from "./context";
const App = () => (
  <Context.Provider value={{ valueTest: 1 }}>
    <HashRouter>
      <Switch>
        <Route
          exact
          path="/"
          render={props => <Hello {...props} name="CodeSandbox" />}
        />
      </Switch>
    </HashRouter>
  </Context.Provider>
);

render(<App />, document.getElementById("root"));

context.js

import React from "react";
export const Context = React.createContext();

Hello.js

import React from "react";
import { Context } from "./context";

export default ({ name }) => (
  <Context.Consumer>
    {value => (
      <h1>
        Hello {name} {value.valueTest}!
      </h1>
    )}
  </Context.Consumer>
);

Working codesandbox

如何将 React.createContext() 与反应路由器一起使用？

How to use React.createContext() with react router?

reactjs

react-router-v4

react-context