javascript - React router warning: Received `true` for a non-boolean attribute `exact`

Javascript - React router warning: Received `true` for a non-boolean attribute `exact`

The warning you're encountering in React Router about receiving true for a non-boolean attribute exact typically occurs when you're using the exact prop incorrectly within a Route component. Let's clarify how to correctly use exact and address the warning.

Understanding the exact Prop

In React Router, the exact prop is used to ensure that a Route matches the exact path specified, rather than matching any path that starts with the specified path. This is useful when you have multiple routes and want to ensure that a route is rendered only when the URL path matches exactly.

Correct Usage of exact

  1. When Using <Route> Component:

    If you're defining routes using <Route>, you should use exact as a boolean prop, not as a string or any other type:

    import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <div> <Route exact path="/" component={Home} /> <Route exact path="/about" component={About} /> <Route exact path="/contact" component={Contact} /> </div> </Router> ); }; export default App;
    • Correct: <Route exact path="/about" component={About} />
    • Incorrect: <Route exact="true" path="/about" component={About} /> (This would cause the warning)

  2. When Using <NavLink> or <Link>:

    Similarly, when using <NavLink> or <Link> to navigate between routes, use exact as a boolean prop:

    import { NavLink } from 'react-router-dom'; const Navbar = () => { return ( <nav> <ul> <li><NavLink exact to="/">Home</NavLink></li> <li><NavLink exact to="/about">About</NavLink></li> <li><NavLink exact to="/contact">Contact</NavLink></li> </ul> </nav> ); }; export default Navbar;
    • Correct: <NavLink exact to="/about">About</NavLink>
    • Incorrect: <NavLink exact="true" to="/about">About</NavLink> (This would cause the warning)

Addressing the Warning

To address the warning "Received true for a non-boolean attribute exact", ensure that:

  • You use exact as a boolean prop (exact or exact={true}) and not as a string or any other type.
  • Check all occurrences of exact props in your <Route>, <Link>, or <NavLink> components and correct them to use the boolean format.

Additional Tips

  • Importing BrowserRouter: Ensure you import BrowserRouter as Router (or HashRouter for hash-based routing) from 'react-router-dom' and use it as Router in your application.
  • Updating Dependencies: Occasionally, warnings may also stem from outdated dependencies. Ensure your react-router-dom package is up to date.

By following these guidelines, you should be able to use the exact prop correctly in React Router and resolve the warning related to non-boolean attribute usage.

Examples

  1. React Router exact attribute boolean value

    • Description: Explains how to correctly use the exact attribute in React Router, ensuring it receives a boolean value.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact={true} path="/" component={Home} /> </Router> ); }; export default App;

  2. React Router exact attribute error fix

    • Description: Provides solutions to resolve the warning about exact attribute in React Router.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact path="/" component={Home} /> </Router> ); }; export default App;

  3. React Router exact attribute boolean requirement

    • Description: Discusses why the exact attribute in React Router requires a boolean value and how to correctly set it.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact={true} path="/" component={Home} /> </Router> ); }; export default App;

  4. React Router warning: Received true for exact

    • Description: Addresses the warning message regarding the exact attribute in React Router and how to fix it.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact path="/" component={Home} /> </Router> ); }; export default App;

  5. React Router exact attribute boolean prop

    • Description: Explains the correct usage of boolean props like exact in React Router.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact={true} path="/" component={Home} /> </Router> ); }; export default App;

  6. React Router exact attribute boolean value required

    • Description: Details why React Router expects a boolean value for the exact attribute and how to provide it.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact={true} path="/" component={Home} /> </Router> ); }; export default App;

  7. React Router exact prop boolean

    • Description: Clarifies how to set the exact prop correctly as a boolean in React Router to avoid warnings.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact={true} path="/" component={Home} /> </Router> ); }; export default App;

  8. React Router warning with exact prop

    • Description: Helps troubleshoot warnings related to the exact prop in React Router.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact path="/" component={Home} /> </Router> ); }; export default App;

  9. React Router boolean exact attribute

    • Description: Discusses the requirement to provide a boolean value for the exact attribute in React Router.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact={true} path="/" component={Home} /> </Router> ); }; export default App;

  10. React Router exact prop boolean value

    • Description: Provides examples and explanations for setting the exact prop correctly with a boolean value in React Router.
    • Code:
      import { BrowserRouter as Router, Route } from 'react-router-dom'; const App = () => { return ( <Router> <Route exact={true} path="/" component={Home} /> </Router> ); }; export default App;

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