examples/cms-sitecore-xmcloud/scripts/config/plugins/computed.ts

import { ConfigPlugin, JssConfig } from "..";

/**
 * This plugin will set computed config props.
 * The "graphQLEndpoint" is an example of making a _computed_ config setting
 * based on other config settings.
 */
class ComputedPlugin implements ConfigPlugin {
  // should come after other plugins (but before fallback)
  order = 10;

  async exec(config: JssConfig) {
    return Object.assign({}, config, {
      graphQLEndpoint:
        config.graphQLEndpoint ||
        `${config.sitecoreApiHost}${config.graphQLEndpointPath}`,
    });
  }
}

export const computedPlugin = new ComputedPlugin();