flexsearch/dist/module-debug/worker/handler.js

import Index from "../index.js";
import { IndexOptions } from "../type.js";

export default (async function (data) {

    data = data.data;

    /** @type Index */
    const index = self._index,
          args = data.args,
          task = data.task;


    switch (task) {

        case "init":

            /** @type IndexOptions */
            let options = data.options || {},
                filepath = options.config;

            if (filepath) {
                options = filepath;
                // will be replaced after build with the line below because
                // there is an issue with closure compiler dynamic import
                //options = await import(filepath);
            }

            const factory = data.factory;

            if (factory) {

                // export the FlexSearch global payload to "self"
                Function("return " + factory)()(self);

                /** @type Index */
                self._index = new self.FlexSearch.Index(options);

                // destroy the exported payload
                delete self.FlexSearch;
            } else {

                self._index = new Index(options);
            }

            postMessage({ id: data.id });
            break;

        default:
            const id = data.id,
                  message = index[task].apply(index, args);

            postMessage("search" === task ? { id: id, msg: message } : { id: id });
    }
});