web-worker

I have a single page React application which consists of many files, bundled with gulp/browserify. Firebase javascript is embedded in this bundle. I'd like to know if there is an easy way to run certain Firebase operations on another worker thread ? What I have tried : Setting up a worker and sending the Firebase object, or instance, via worker.postMessage(xxx) . In both cases, it throws an error which says the object cannot be cloned . Example bellow with the Firebase object. var blobURL = URL.createObjectURL(new Blob([ '(', (function() { var onmessage = function(event) { var FB = new event

I see that some websites have a fancy push notification permission request popups like this one whereas official API documentation doesn't provide any clue how to customize permission requests; and the only request I can generate looks like that How can I create a less ugly popup? Click the Allow button on the House of Bots site and you'll see exactly how they do it--they don't. The pop-up you see is just plain html, nothing special. When you click allow, it opens a new window that asks for permission, and then you get the typical browser window just like in your second image. 来源： https:/

I want to use dracoLoader of threeJS in multi-threads, then I selected Webworker and IndexedDB. I have gotten the correct Geometry in webworker, however, when I pass data to main thread using IndexedDB, the geometry will be changed to a normal JS object instead of a ThreeJS Geometry. The geometry lost its functions and some information. webworker.js self.saveDrcToIndexedDB = function (drcfinal) { var db; var request = indexedDB.open("drcDB"); drcfinal.indexName = self.randomStr(); request.onupgradeneeded = function(event) { console.log('successfully upgraded db'); db = event.target.result; var

I'm trying to implement a working WebSocket connection within a WebWorker. That should be simple and it is if I use Chrome as b rowser. However, since this experiment should further become part of a production I need it to work on all the great Browsers, namely also Firefox. My problem is that I can't get it working with Firefox. At first Firefox wasn't able to create a WebWorker. That was a Bug and is fixed with version 9. But now it seems that it wouldn't be able to create a WebSocket within the Worker. I tried the following line of code: var ws = new WebSocket(url); which fails with:

I recently started with Dart ( www.dartlang.org ) and really like it so far. A very promising feature are isolates, but I am not sure on how to start. The documentation I found so far is from before a breaking change ( BREAKING CHANGE: dart:isolate ) in October 2013. The information in this "Breaking change" email is quite complicated and it looks like the new api is more complicated than the old. I've got some questions: Is the dart:isolate api stable? Is there any up-to-date documentation? Are there any working examples? Thanks for any help, Hendrik Jan I tried this example and it works

Since Web-Worker JSON serialize data between threads, something like this doesn't work: worker.js function Animal() {} Animal.prototype.foobar = function() {} self.onmessage = function(e) { self.postMessage({animal: new Animal()}) } main.js let worker = new Worker('worker.js') worker.onmessage = function(e) { console.log(e.data) } worker.postMessage('go!') The outcome would be a simple object with the loss of the foobar prototype method. Is it possible to transfer the custom object back to the main thread without losing its prototype methods? Like, would this be possible with ArrayBuffer ? I'm

I am running computations e.g. path-finding in web workers. This can take several seconds and I want to optimise it. Chrome seems to be about 3x faster for my current code, but where the time is spent or why I have no insight into. Generally, how can you debug web workers? How can you profile web workers? (Firefox and Chrome) In Chrome you may open web worker source in Sources > Workers and get full interface to prifile. Profiling in Firefox - no idea. And http://www.nczonline.net/blog/2009/08/25/web-workers-errors-and-debugging/ 来源： https://stackoverflow.com/questions/16326495/debugging-and

In a browser environment, setTimeout and setInterval aren't reliable for accuracy - where time sensitivity is an issue. Recently, we've been given requestAnimationFrame , which allows us to do a little better (in terms of performance.now() and its timestamps). Long story short - I decided to build a metronome in Javascript, and while it works, it's fairly inaccurate above a certain tempo. While compensating for late frames allows the tempo not to desync over time, the individual beats are slightly off, which doesn't work for a metronome. (This is not a problem for animation, as it by nature