Web Worker Association

Question

Does anyone know of good templates / libraries to bring together web workers?

I want to do something like the following:

• Set the maximum number of threads.
• The first time I ask an employee to create a new one.
• Next time, he will return the previous Worker if he has not completed the operation, in which case he will create a new one and return it.
• As soon as we reach the maximum, he will begin requests for priority for workers and will begin them when the worker becomes available.
• It is currently assumed that the pool will use the same .js file.

Or is there a better approach to this?