sample.js

uploadFile = (file) => {
      AWS.config.update({
        region: 'ap-south-1',
        accessKeyId: process.env.REACT_APP_AWSAccessKeyId,
        secretAccessKey: process.env.REACT_APP_AWSSecretKey,
      })
      const send_file = file
      file = file.split('.')
      const params = {
        ACL: 'public-read',
        Key: file[0],
        ContentType: 'application/octet-stream',
        Body: send_file,
        Bucket: process.env.REACT_APP_Bucket
      }
      var myBucket = new AWS.S3()
      myBucket.putObject(params)
        .on('httpUploadProgress', (evt) => {
          this.setState({
            url: `https://${process.env.REACT_APP_Bucket}.s3.amazonaws.com/${file[0]}`
          })
        })
        .send((err) => {
           if (err) {
             console.log(err)
           }
        })
    }