index.js

window.onload = function() {
  const ui = SwaggerUIBundle({
    url: `./swagger`,
    dom_id: '#swagger-ui',
    tagsSorter: 'alpha',
    presets: [SwaggerUIBundle.presets.apis, SwaggerUIStandalonePreset],
    plugins: [SwaggerUIBundle.plugins.DownloadUrl],
    validatorUrl: null,
    deepLinking: true
  });

  window.ui = ui;
};