import bootstrap from 'bootstrap'

const bootstrap = require('bootstrap');

I tried to build a project with "create-react-app" and found that the loading order of imported modules is not same with importing order. And this is the reason why boostrap can't find jquery. Generally, you can use "require" in this condition. It works on my pc.

import $ from 'jquery';
window.jQuery = $;
window.$ = $;
global.jQuery = $;
const bootstrap = require('bootstrap');
console.log(bootstrap)

Relevant things:

imports are hoisted

https://stackoverflow.com/a/29334761/4831179

imports should go first

Notably, imports are hoisted, which means the imported modules will be evaluated before any of the statements interspersed between them. Keeping all imports together at the top of the file may prevent surprises resulting from this part of the spec.

from https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/first.md

Are you using webpack? If so, add this on your webpack.config.js.

plugins: [
  new webpack.ProvidePlugin({
    jQuery: 'jquery',
    $: 'jquery'
  })
],

When using create-react-app, First You need to install the Jquery package like this.

sudo npm install jquery --save 

and react-bootstrap like this

 sudo npm install react-bootstrap --save

Now in the JS files you can use both jquery and bootstrap like this.

 import $ from 'jquery';
 import { Carousel, Modal,Button, Panel,Image,Row,Col } from 'react-bootstrap';

you can use this url for react bootstrap components https://react-bootstrap.github.io/components.html

you can use Buttons with onclick function like this

<Button bsStyle="primary" bsSize="large" active onClick={this.getData()}>Sample onClick</Button>

in the

 getData(){
 $.ajax({
   method: 'post',
   url:'http://someurl/getdata',
   data: 'passing data if any',
   success: function(data){
      console.log(data);
      alert(data);
      this.setState({
         some: data.content,
         some2: data.content2,
      });
   },
   error: function(err){
      console.log(err);
   }
 });

all of this is basic example using jquery and bootstrap if you need more you can write comments about this.