gatsby-node.js

exports.onCreateWebpackConfig = ({ stage, actions, getConfig }) => {
  if (stage === 'build-html') {
    actions.setWebpackConfig({
      externals: getConfig().externals.concat(function (
        context,
        request,
        callback
      ) {
        const regex = /^@?firebase(\/(.+))?/;
        // exclude firebase products from being bundled, so they will be loaded using require() at runtime.
        if (regex.test(request)) {
          return callback(null, 'umd ' + request);
        }
        callback();
      })
    });
  }
};

// graphql function doesn't throw an error so we have to check to check for the result.errors to throw manually
const wrapper = (promise) =>
  promise.then((result) => {
    if (result.errors) {
      throw result.errors;
    }
    return result;
  });

const re = /^\/([\w-]+)\/me/;

exports.onCreatePage = async ({ page, actions }) => {
  const { createPage } = actions;

  const match = re.exec(page.path);
  // Only update the `/me` page.
  if (match) {
    // page.matchPath is a special key that's used for matching pages
    // with corresponding routes only on the client.
    page.matchPath = `${match[0]}/*`;
    // Update the page.
    createPage(page);
  }
};