如何正确地将回调和 state 传递给 React Router Dom 中的 Layout 元素？

Question

How to correctly pass callbacks and states to the Layout so that they can be used elsewhere? When I share this as below, I have errors and a white screen:

class Menu extends Component {
  constructor(props) {
    super(props);
    this.onSearchF = this.onSearchF.bind(this)
  } 
  state = {
    searchBlock: false,
  };

  onSearchF = (keyword) => {
    const filtered = this.state.data.filter((entry) =>
      Object.values(entry).some(
        (val) => typeof val === "string" && val.toLowerCase().includes(keyword.toLowerCase())
      )
    );
  };
  render() {
    return (
      <div className="content">
        <Routes>
          <Route path="/" element={<Layout searchBlock={this.state.searchBlock} onSearch={()=>this.onSearchF()}/>}>
            <Route
              index
              element={
                <Home data={this.state.data} num={this.state.data.length} />
              }
            />
          </Route>
        </Routes>
      </div>
    );
  }
}
export default Menu;

Here I pass the callback to the Header that I previously passed to the Layout :

const Layout = () => {
  return (
    <>
      <Header sblock={this.props.searchBlock} onS = {this.props.onSearch}/>  
    </>
  );
};
export default Layout;

I want to use the callback here:

function Header() {
  return (
    <header className="header">
        <button onClick={()=>console.log(this.props.sblock)}>button</button>
    </header>
  );
}

export default Header;

Answer 1

Your Layout is a functional component, and you are trying to use this.props in it; this is incorrect. Get the props as part of arguments instead, like so:

import { Outlet } from "react-router-dom";
const Layout = ({searchBlock,onSearch}) => {
  return (
    <>
      <Header sblock={searchBlock} onS={onSearch}/>  
      <Outlet/>
    </>
  );
};
export default Layout;

Answer 2

Issues

• The Layout component isn't accepting any props.
• The Layout component isn't rendering an Outlet for nested routes.

Solution

It seems that Layout only exists to render the Header component. I'd suggest rendering Header directly in the Main component.

Example:

class Menu extends Component {
  state = {
    data: [],
    searchBlock: false,
  };

  onSearch = (keyword) => {
    const filtered = this.state.data.filter((entry) =>
      Object.values(entry).some((val) => 
        typeof val === "string"
        && val.toLowerCase().includes(keyword.toLowerCase())
      )
    );

    ... do something with filtered ...
  };

  render() {
    const { data, searchBlock } = this.state;

    return (
      <div className="content">
        <Header sblock={searchBlock} onS={this.onSearch} />
        <Routes>
          <Route
            path="/"
            element={<Home data={data} num={data.length} />}
          />
        </Routes>
      </div>
    );
  }
}

export default Menu;