React apps component not working as expected

Question

Here is the main react app. In the navbar component I tried to change the background color from the main react app by props. But it's not changing the color.

import './App.css';
import About from './components/About';
import Navbar from './components/Navbar';
import Textform from './components/Textform';
import React, {useState} from 'react'



function App() {
  const [mod, setmod] = useState("lightl")

  return (
    <>
       <Navbar title="Hello" mode={mod} />
       <div className ="container">
        <Textform/>
       </div>
      <div className ="container">
        <About/>
      </div>
    </>
     
  );
}

export default App;

And here is the navbar component.

import React from 'react'

export default function Navbar(props) {
  return (
    <div>
      <nav className={`navbar navbar-expand-lg navbar-${props.mod} bg-${props.mod}`}>
    <div className="container-fluid">
      <a className="navbar-brand" href="/">{props.title}</a>
      <button className="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
        <span className="navbar-toggler-icon"></span>
      </button>
      <div className="collapse navbar-collapse" id="navbarSupportedContent">
        <ul className="navbar-nav me-auto mb-2 mb-lg-0">
          <li className="nav-item">
            <a className="nav-link active" aria-current="page" href="/">Home</a>
          </li>
          <li className="nav-item">
            <a className="nav-link" href="/">Link</a>
          </li>
          <li className="nav-item dropdown">
            <a className="nav-link dropdown-toggle" href="/" id="navbarDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
              Dropdown
            </a>
            <ul className="dropdown-menu" aria-labelledby="navbarDropdown">
              <li><a className="dropdown-item" href="/">Action</a></li>
              <li><a className="dropdown-item" href="/">Another action</a></li>
              <li><hr className="dropdown-divider"/></li>
              <li><a className="dropdown-item" href="/">Something else here</a></li>
            </ul>
          </li>
          <li className="nav-item">
            <a className="nav-link disabled" href="/" tabIndex="-1" aria-disabled="true">Disabled</a>
          </li>
        </ul>
        <form className="d-flex">
          <input className="form-control me-2" type="search" placeholder="Search" aria-label="Search"/>
          <button className="btn btn-outline-success" type="submit">Search</button>
        </form>
      </div>
    </div>
  </nav>
    </div>
  )
}

I found the following warning in terminal

(https://i.sstatic.net/FrUE6FVo.png) (https://i.sstatic.net/IYIhMolW.png)

And this error in browser inspect

(https://i.sstatic.net/9nYo4YXK.png)

What I missed and what should I change. I also used bootstrap for style. and the course is from Coding with harry.

You're passing a mode prop to Navbar but it seems like the prop is actually mod — Nick Parsons
– Nick Parsons, Commented Oct 3, 2024 at 13:47

sfwnisme · Accepted Answer · 2024-10-03 14:27:08Z

1

you need to pass the entire class from the mod state for example

// ther right way
const [mod, setMod] = useState('navbar-lightl')

the second issue you used mod prop while it should be mode as it is the prop name you passed from the component

edited Oct 3, 2024 at 14:27

answered Oct 3, 2024 at 14:25

sfwnisme

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