npm install --save react react-copy-to-clipboard

const App = React.createClass({
 getInitialState() {
  return {value: '', copied: false};
 },


 onChange({target: {value}}) {
  this.setState({value, copied: false});
 },


 onCopy() {
  this.setState({copied: true});
 },


 render() {
  return (
   <div>
    <h1>CopyToClipboard</h1>

    <input value={this.state.value} size={10} onChange={this.onChange} /> 

    <CopyToClipboard text={this.state.value} onCopy={this.onCopy}>
     <span>Copy to clipboard with span</span>
    </CopyToClipboard> 

    <CopyToClipboard text={this.state.value} onCopy={this.onCopy}>
     <button>Copy to clipboard with button</button>
    </CopyToClipboard> 


    {this.state.copied ? <span style={{color: 'red'}}>Copied.</span> : null}

    <br />

    <textarea style={{marginTop: '1em'}} cols="22" rows="3" />

   </div>
  );
 }
});

const appRoot = document.createElement('div');

appRoot.id = 'app';
document.body.appendChild(appRoot);
ReactDOM.render(<App />, appRoot);