Can I pass parameters to .js function when I create the new Web Workers object?

Question

When I create a web workers like the following...

 var w = new Worker("./Scripts/sample.js");

sample.js want to some parameters from the caller!!
Possible?

Answer 1

I haven't used web workers a whole bunch, but per this description I believe you could do it along these lines:

var worker = new Worker("sample.js");
worker.postMessage({ "args": [ ] });

Then, in sample.js, structure it along these lines:

self.addEventListener("message", function(e) {
  var args = e.data.args;
  // do whatever you need with the arguments
}, false);

This isn't quite the same as a traditional argument passing, as whatever goes in postMessage must be formattable as a JSON (e.g. no functions). But, there's a decent chance it can be made to do what you need it to do.