Example of `are-you-ready-yet` used with `Comlink`

README.md

Example of are-you-ready-yet used with Comlink

• GoogleChromeLabs/comlink
• are-you-ready-yet

main.js

import { bridge } from './test-bridge.js'

bridge.doThis()

setTimeout(async () => {
    bridge.create()

    setTimeout(async () => {
        await bridge.doThat()
    }, 5000);
}, 5000);

test-bridge.js

import { areYouReadyYet } from 'are-you-ready-yet'
import * as Comlink from 'comlink'
import TestWorker from 'worker-loader!./test-worker'

class TestBridge {
    constructor(options = null) {
        this.ready = areYouReadyYet()

        /** @type {Worker} */
        const worker = new TestWorker()
        /** @type {Comlink.Remote<import('./test-worker').Test} */
        const remote = Comlink.wrap(worker)

        this.worker = worker
        this.remote = remote

        /** @type {import('./test-worker').Test} */
        this.instance = null

        // If options provided, immediate create instance
        if (options) this.create(options)
    }

    async create(options = {}) {
        // If already created, ignore
        if (this.instance) return this.instance

        const Instance = this.remote
        const remote = new Instance(options)
        this.instance = await remote
        
        // Send ready signal
        this.ready.yes()
        
        return this.instance
    }

    async doThis() {
        await this.ready.maybe()
        this.instance.doThis()
    }

    async doThat() {
        await this.ready.maybe()
        this.instance.doThat()
    }

    terminate() {
        this.remote[Comlink.releaseProxy]()
        this.worker.terminate()
        
        // Re-create ready promise
        this.ready = areYouReadyYet()
    }
}


export const bridge = new TestBridge()

test-worker.js

import * as Comlink from 'comlink'

export class Test {
    constructor(options = {}) {
        console.info('Test.constructor', options)
    }

    doThis() {
        console.info('Test.doThis')
    }

    doThat() {
        console.info('Test.doThat')
    }
}

Comlink.expose(Test)