Bootstrap Dropdown Not Working in React

To make dropdown menu and other js stuff work in 4th Bootstrap you need just follow next steps: install with npm to dependencies:

npm i --save bootstrap jquery popper.js

add it to index.js

import 'bootstrap';
import 'bootstrap/dist/css/bootstrap.css';
import 'bootstrap/dist/js/bootstrap.js';
import $ from 'jquery';
import Popper from 'popper.js';

all steps are taken from here

It's because you've added HTML and CSS but not the js for it. Your code doesn't know what to do when you click on the dropdown. Here is an example how you have to do that. And the code below:

class Dropdown extends React.Component {
  state = {
    isOpen: false
  };

  toggleOpen = () => this.setState({ isOpen: !this.state.isOpen });

  render() {
    const menuClass = `dropdown-menu${this.state.isOpen ? " show" : ""}`;
    return (
      <div className="dropdown" onClick={this.toggleOpen}>
        <button
          className="btn btn-secondary dropdown-toggle"
          type="button"
          id="dropdownMenuButton"
          data-toggle="dropdown"
          aria-haspopup="true"
        >
          Dropdown
        </button>
        <div className={menuClass} aria-labelledby="dropdownMenuButton">
          <a className="dropdown-item" href="#nogo">
            Item 1
          </a>
          <a className="dropdown-item" href="#nogo">
            Item 2
          </a>
          <a className="dropdown-item" href="#nogo">
            Item 3
          </a>
        </div>
      </div>
    );
  }
}

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

In App.js Import like this

import "../node_modules/bootstrap/dist/css/bootstrap.min.css";

import "../node_modules/bootstrap/dist/js/bootstrap.bundle.min.js";

after a long searching and tweaking I got the answer here

you just have to add a css to resolve this issue. when you click on dropdown button, it adds a class "show" to that element and as per bootstrap that much is sufficient to make a dropdown button work.

.show>.dropdown-menu {
  display: block;
  position: absolute;
}

for me it work like charm.

I tries @teimurjan solution and it worked for me but with two issues

1. I have to manage a state even though its not needed
2. once dropdown clicked the expanded menu does not disappear on click of body or anywhere else.

For me this issue was fixed by using Bootstrap 4.5 instead of Bootstrap 5.

To do this with yarn write:

yarn remove bootstrap
yarn add bootstrap@^4.5

In index.js I then just import it like this.

import 'bootstrap';
import 'bootstrap/dist/css/bootstrap.css';

Add bootstrap as a module -

npm i --save bootstrap

From my experience, please add this line to your index.js and try again -

import 'bootstrap';

Let me know how it goes.

import 'bootstrap/dist/js/bootstrap'

add this to app.js or index.js file

To solve this issue need to pass rootCloseEvent, for example

 
    <DropdownButton                          
    title="Download"
    rootCloseEvent="mousedown"
  >
    <MenuItem
      onClick={}
    >
      PDF
    </MenuItem>
    <MenuItem
      onClick={}
    >
      CSV
</MenuItem>
<DropdownButton/>

If you use bootstrap ^5 you should use data-bs-* attributes like :

data-toggle="dropdown" must change to data-bs-toggle="dropdown"

If you use bootstrap 4 or Less than you should use jquery and popper.js like this:

  npm i --save bootstrap jquery popper.js

    import 'bootstrap';
    import 'bootstrap/dist/css/bootstrap.css';
    import 'bootstrap/dist/js/bootstrap.js';
    import $ from 'jquery';
    import Popper from 'popper.js';