Bootstrap Dropdown not working in React

Question

I'm trying to get a dropdown working inside a form for one of my React components. Here is how I'm setting up the dropdown portion of the code, the following is inside a form parent tag which is inside the div tag that I'm returning.:

//<div> //<form> //some code here      <div className="row top-buffer">         <div className="col">             <div className="dropdown">                 <button                      className="btn btn-secondary dropdown-toggle"                      type="button"                      id="dropdownMenuButton"                      data-toggle="dropdown"                      aria-haspopup="true">                     Dropdown                 </button>                 <div className="dropdown-menu" 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>         </div>     </div>  //some code here //</form> //</div> 

However, when I click the Dropdown button, it does not display the dropdown menu and the items in it.

All my other bootstrap components are working fine. What am I doing wrong?

EDIT:

I referenced bootstrap in my index.js:

import React from 'react'; import ReactDOM from 'react-dom'; import './index.css'; import App from './App'; import 'bootstrap/dist/css/bootstrap.min.css' import './App.css' import registerServiceWorker from './registerServiceWorker';  ReactDOM.render(<App />, document.getElementById('root')); registerServiceWorker(); 

Am I missing something?

Answer 1

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

Answer 2

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"));