Image upload and preview, based React.js
var React = require('react') var ReactDOM = require('react-dom') // import component var FileInput = require('./src/fileInput') var App = React.createClass({ getInitialState: function () { return { files: [] } }, onChange: function (files) { this.setState({ files: this.state.files.concat(files) }) }, render: function () { return ( <div> <FileInput onChange={this.onChange} multiple={false} /> {this.state.files.length ? <div className="thumb-box"> { /* using files */ } </div> : null} </div> ) } }) ReactDOM.render( <App />, document.querySelector(mountNode) )