@evolu/web/dist/src/WebWorker.js

Evolu for web

/**
 * Typed wrapper for Web Worker
 *
 * While Comlink DX is nice, there are still memory leaks and unresolved bugs.
 * Use plain Web Worker with a typed wrapper if maximum performance and
 * reliability are required.
 *
 * @module
 */
import { constVoid } from "@evolu/common";
/**
 * Wraps a Web Worker to provide a typed interface for sending and receiving
 * messages.
 */
export const wrapWebWorker = (createWebWorker) => {
    // Server.
    if (typeof document === "undefined")
        return {
            postMessage: constVoid,
            onMessage: constVoid,
        };
    const webWorker = createWebWorker();
    const worker = {
        postMessage: (message) => {
            webWorker.postMessage(message);
        },
        onMessage: (callback) => {
            webWorker.onmessage = (event) => {
                callback(event.data);
            };
        },
    };
    return worker;
};
export const wrapWebWorkerSelf = (worker) => {
    worker.onMessage((message) => {
        postMessage(message);
    });
    self.onmessage = (event) => {
        worker.postMessage(event.data);
    };
};