require-example.js

const background = require('./assets/background.png')
// ...
{
  //...
  render: function() {
    return (
      <div>
        <img src={background} />
        <img src={background + '-/resize/600x/-/blur/10/-/mirror/-/format/jpg/-/quality/best/-/progressive/yes/'}>
      </div>
    );
  }
}
// Somewhere in your DOM:

// => <div>
// =>   <img src="https://ucarecdn.com/85b5644f-e692-4855-9db0-8c5a83096e25/" />
// =>   <img src="https://ucarecdn.com/85b5644f-e692-4855-9db0-8c5a83096e25/-/resize/600x/-/blur/10/-/mirror/-/format/jpg/-/quality/best/-/progressive/yes/" />
// => </div>