import React from "react";
import ImageUploader from "react-images-upload";

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = { pictures: [] };
    this.onDrop = this.onDrop.bind(this);
  }

  onDrop(pictureFiles, pictureDataURLs) {
    this.setState({
      pictures: this.state.pictures.concat(pictureFiles)
    });
  }

  render() {
    return (
      <ImageUploader
        withIcon={true}
        buttonText="Choose images"
        onChange={this.onDrop}
        imgExtension={[".jpg", ".gif", ".png", ".gif"]}
        maxFileSize={5242880}
      />
    );
  }
}

import React, { useState } from "react";
import ImageUploader from "react-images-upload";

const App = props => {
  const [pictures, setPictures] = useState([]);

  const onDrop = picture => {
    setPictures([...pictures, picture]);
  };
  return (
    <ImageUploader
      {...props}
      withIcon={true}
      onChange={onDrop}
      imgExtension={[".jpg", ".gif", ".png", ".gif"]}
      maxFileSize={5242880}
    />
  );
};

export default App;