fixNedbForElectronRenderer.js

// Prevent nedb from substituting browser storage when running from the
// Electron renderer thread.
const fixNedbForElectronRenderer = {
  // eslint-disable-next-line @typescript-eslint/explicit-function-return-type
  apply(resolver) {
    resolver
      // Plug in after the description file (package.json) has been
      // identified for the import, because we'll depend on it for some of
      // the logic below.
      .getHook("beforeDescribed-relative")
      .tapAsync(
        "FixNedbForElectronRenderer",
        (request, resolveContext, callback) => {
          // Detect that the import is from NeDB via the description file
          // dectect for the import. Calling `callback` with no parameters
          // "bails", which proceeds with the normal resolution process.
          if (!request.descriptionFileData.name === "nedb") {
            return callback();
          }

          // When a require/import matches the target files from nedb, we
          // can form the paths to the Node-specific versions of the files
          // relative to the location of the description file. We can then
          // short-circuit the Webpack resolution process by calling the
          // callback with the finalized request object -- meaning that
          // the `path` is pointing at the file that should be imported.
          let relativePath;
          if (
            request.path.startsWith(
              resolver.join(request.descriptionFileRoot, "lib/storage")
            )
          ) {
            relativePath = "lib/storage.js";
          } else if (
            request.path.startsWith(
              resolver.join(request.descriptionFileRoot, "lib/customUtils")
            )
          ) {
            relativePath = "lib/customUtils.js";
          } else {
            // Must be a different file from NeDB, so bail.
            return callback();
          }

          const path = resolver.join(request.descriptionFileRoot, relativePath);
          const newRequest = Object.assign({}, request, { path });
          callback(null, newRequest);
        }
      );
  },
};

module.exports = fixNedbForElectronRenderer;