show preview upload img in react code example

Example 1: react image upload

/* Answer to: "react image upload" */

/*
  "react-images-upload" is a simple component for upload and
  validate (client side) images with preview built with React.js.
  This package use "react-flip-move [1]" for animate the file preview
  images.
  
  Download it here:
  https://www.npmjs.com/package/react-images-upload
  
  or if you need help or don't want to use packages,
  you can watch this video:
  https://www.youtube.com/watch?v=XeiOnkEI7XI

  [1] Link to "react-flip-move", mentioned in the 
  "react-images-upload" summary:
  https://github.com/joshwcomeau/react-flip-move
*/

Example 2: get image url in react input file or preview form image

getInitialState: function(){
  return{file: []}
}

_onChange: (event)=>{
    this.setState({
        imgs: event.target.files
    })
},

render: function(){
 return(
  <div>
    <form>
      <input 
        ref="file" 
        type="file" 
        name="user[image]" 
        multiple="true"
        onChange={this._onChange}/>
    </form>

    {/* Display all selected images. */}        
    {this.state.imgs && [...this.state.imgs].map((file)=>(
       <img src={URL.createObjectURL(file)} />
    ))}

  </div>
 )
}