是的，这是可能的，我做到了使用Blob文件和传递回调

我将向您展示我编写的一个类是做什么的，以及它如何在后台管理回调的执行。

首先，你要实例化GenericWebWorker，使用你想要传递给回调的任何数据，这些数据将在WebWorker中执行，包括你想要使用的函数，在这种情况下，一个数字，一个日期和一个叫做blocker的函数

var worker = new GenericWebWorker(100, new Date(), blocker)

这个阻塞器函数将在n毫秒内执行一个无限while

function blocker (ms) {
    var now = new Date().getTime();
    while(true) {
        if (new Date().getTime() > now +ms)
            return;
    }   
}

然后像这样用

worker.exec((num, date, fnBlocker) => {
    /*Everithing here does not block the main thread
      and this callback has access to the number, date and the blocker */
    fnBlocker(10000) //All of this run in backgrownd
    return num*10

}).then(d => console.log(d)) //Print 1000

现在，是时候看看下面例子中的神奇之处了

/*https://github.com/fercarvo/GenericWebWorker*/ class GenericWebWorker { constructor(...ags) { this.args = ags.map(a => (typeof a == 'function') ? {type:'fn', fn:a.toString()} : a) } async exec(cb) { var wk_string = this.worker.toString(); wk_string = wk_string.substring(wk_string.indexOf('{') + 1, wk_string.lastIndexOf('}')); var wk_link = window.URL.createObjectURL( new Blob([ wk_string ]) ); var wk = new Worker(wk_link); wk.postMessage({ callback: cb.toString(), args: this.args }); var resultado = await new Promise((next, error) => { wk.onmessage = e => (e.data && e.data.error) ? error(e.data.error) : next(e.data); wk.onerror = e => error(e.message); }) wk.terminate(); window.URL.revokeObjectURL(wk_link); return resultado } async parallel(arr, cb) { var res = [...arr].map(it => new GenericWebWorker(it, ...this.args).exec(cb)) var all = await Promise.all(res) return all } worker() { onmessage = async function (e) { try { var cb = new Function(`return ${e.data.callback}`)(); var args = e.data.args.map(p => (p.type == 'fn') ? new Function(`return ${p.fn}`)() : p); try { var result = await cb.apply(this, args); //If it is a promise or async function return postMessage(result) } catch (e) { throw new Error(`CallbackError: ${e}`) } } catch (e) { postMessage({error: e.message}) } } } } function blocker (ms) { var now = new Date().getTime(); while(true) { if (new Date().getTime() > now +ms) return; } } setInterval(()=> console.log("Not blocked " + Math.random()), 1000) console.log("\n\nstarting blocking code in Worker\n\n") var worker = new GenericWebWorker(100, new Date(), blocker) worker.exec((num, date, fnBlocker) => { fnBlocker(7000) //All of this run in backgrownd return num*10 }) .then(d => console.log(`\n\nEnd of blocking code: result ${d}\n\n`)) //Print 1000

使用我的小插件https://github.com/zevero/worker-create

var worker_url = Worker.createURL(function(e){
  self.postMessage('Example post from Worker'); //your code here
});
var worker = new Worker(worker_url);

我的看法是:

function BuildWorker(fn){
   var str = fn.toString().match(/^[^{]+{([\s\S]+)}\s*$/m)[1];
   return  new Worker(window.URL.createObjectURL(
                new Blob([str],{type:'text/javascript'})));
}

function createAsyncWorker(fn){
    
    // asyncworker=createAsyncWorker(function(){
    //     importScripts('my_otherscript.js');
    //     self.onmessage = function([arg1,arg2]) {
    //         self.postMessage('msg from worker');
    //     };
    // })
    // await asyncworker.postMessage('arg1','value')
    // await asyncworker.postMessage('arg1','value')
    // asyncworker.worker.terminate()
    
    var worker = BuildWorker(fn);

    function postMessage(...message){
        let external={}, promise= new Promise((resolve,reject)=>{external.resolve=resolve;external.reject=reject;})
        worker.onmessage = function(message){ external.resolve(message.data)};
        worker.postMessage(message); // Start the worker.
        return promise;
    }

    return {worker,postMessage};
}

使用的例子:

autoarima = createAsyncWorker(function(){
    importScripts("https://127.0.0.1:11000/arima.js")
    
    self.onmessage=(message)=>{
        let [action,arg1,arg2]=message.data
        if(action=='load')
        {
            ARIMAPromise.then(ARIMA1 => {
                ARIMA=ARIMA1
                autoarima = new ARIMA({ auto: true });
                //   const ts = Array(10).fill(0).map((_, i) => i + Math.random() / 5)
                //   const arima = new ARIMA({ p: 2, d: 1, q: 2, P: 0, D: 0, Q: 0, S: 0, verbose: false }).train(ts)
                //   const [pred, errors] = arima.predict(10)
                postMessage('ok')
            });
        }
        if(action=='fit')
        {
            autoarima.fit(arg1)
            postMessage('ok')
        }
        if(action=='predict')
        {
            postMessage(autoarima.predict(arg1,arg2)) 
        }
    };
})
autoarima.terminate=function(){  this.worker.terminate(); }
autoarima.load=async function(...args){return await this.postMessage('load',...args)}
autoarima.fit=async function(...args){return await this.postMessage('fit',...args)}
autoarima.predict=async function(...args){return await this.postMessage('predict',...args)}

await autoarima.load()
await autoarima.fit(b_values)
await autoarima.predict(1)

一个更好的阅读方式为内联工人..

    var worker_fn = function(e) 
    {
        self.postMessage('msg from worker');            
    };

    var blob = new Blob(["onmessage ="+worker_fn.toString()], { type: "text/javascript" });

    var worker = new Worker(window.URL.createObjectURL(blob));
    worker.onmessage = function(e) 
    {
       alert(e.data);
    };
    worker.postMessage("start"); 

看一下vkThread插件。使用htis插件，你可以在主代码中获取任何函数，并在线程(web worker)中执行它。所以，你不需要创建一个特殊的“web-worker文件”。

http://www.eslinstructor.net/vkthread/

——瓦迪姆

你可以把worker.js文件的内容放在反勾号(允许多行字符串常量)中，然后像这样创建一个blob:

var workerScript = `
    self.onmessage = function(e) {
        self.postMessage('message from worker');
    };
    // rest of worker code goes here
`;

var worker =
    new Worker(createObjectURL(new Blob([workerScript], { type: "text/javascript" })));

如果出于某种原因，您不想为worker使用单独的脚本标记，那么这是非常方便的。