@before.js/client/config/file-transform.js

Enables data fetching with any React SSR app that uses React Router 5

'use strict';

const path = require('path');

// This is a custom Jest transformer turning file imports into filenames.
// http://facebook.github.io/jest/docs/en/webpack.html
module.exports = {
  process(src, filename) {
    const assetFilename = JSON.stringify(path.basename(filename));

    if (filename.match(/\.svg$/)) {
      return `module.exports = {
        __esModule: true,
        default: ${assetFilename},
        ReactComponent: () => ${assetFilename},
      };`;
    }

    return `module.exports = ${assetFilename};`;
  }
};