reactjs - reactstrap ButtonDropdown not working -


i have no idea why buttondropdown isn't working. try learn react, not find failure in code:

import react 'react';  import {render} 'react-dom';  //import 'bootstrap/dist/css/bootstrap.css';  //also when try import bootstrap isn`t working  import {  	buttondropdown, dropdowntoggle,   	dropdownmenu, dropdownitem } 'reactstrap';    class app extends react.component {     constructor(props) {      super(props);  	this.toggle_dropdownrunde = this.toggle_dropdownrunde.bind(this);  	this.changetext_dropdownrunde = this.changetext_dropdownrunde.bind(this);   	      this.state = {  		dropdownrunde_open: false,  		dropdownrunde_text: "-- wait response --",      };	    }     	toggle_dropdownrunde() {    		this.setstate({  		  dropdownrunde_open: !this.state.dropdownrunde_open  		});  	}   	  	changetext_dropdownrunde() {   		this.setstate({  			dropdownrunde_text: "hello different"  		});  	}         render () {        return (    		<div>  			  <buttondropdown   				isopen={this.state.dropdownrunde_open}    				toggle={this.toggle_dropdownrunde} >  				<dropdowntoggle caret>  				{ this.state.dropdownrunde_text }  				</dropdowntoggle>  				<dropdownmenu>  				  <dropdownitem value="round 1" onclick={this.changetext_dropdownrunde}>round 1</dropdownitem>  				  <dropdownitem value="round 2" onclick={this.changetext_dropdownrunde}>round 2</dropdownitem>  				</dropdownmenu>  			  </buttondropdown>	  		</div>  	);    }  }    render((      <app />  ), document.getelementbyid('app'));
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/y6pd6fv/vv2hjna6t+vslu6fwyxjcftcephbnj0lyafsxtsjbbfadjzaleqsn6m" crossorigin="anonymous">
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>  <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>  <body>  	<div id="app" />      <script src="bundle.js"></script>    </body>

sorry, didn`t running on jsfiddle (shameonme)

the problem buttondropdown shown correctly not expand. when click on button nothing changes. doing wrong? thank you

package.json (if needed):

"babel-core": "^6.25.0", "babel-loader": "^7.1.0", "babel-preset-es2015": "^6.24.1", "babel-preset-react": "^6.24.1", "bootstrap": "^4.0.0-alpha.6", "node-rest-client": "^3.1.0", "react": "^15.6.1", "react-addons-css-transition-group": "^15.6.0", "react-addons-transition-group": "^15.6.0", "react-bootstrap-table": "^4.0.1", "react-burger-menu": "^2.1.4", "react-dom": "^15.6.1", "react-router-dom": "^4.1.2", "reactstrap": "^4.8.0", "webpack": "^3.4.1"


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