Workers are background tasks that can be easily created and can send messages back to their creators. Creating a worker is as simple as calling the Worker() constructor, specifying a script to be run in the worker thread.
Of note is the fact that workers may in turn spawn new workers as long as those workers are hosted within the same origin as the parent page. In addition, workers may use XMLHttpRequest for network I/O, with the exception that the responseXML and channel attributes on XMLHttpRequest always return null.
For a list of global functions available to workers, see Functions available to workers.
See Using web workers for examples and details.
Documentation for this class was provided by MDN. var onmessage : EventListener function new() : Void
The constructor creates a web worker that executes the script at the specified URL. This script must obey the same-origin policy. Note that there is a disagreement among browser manufacturers about whether a data URI is of the same origin or not. Though Gecko 10.0 (Firefox 10.0 / Thunderbird 10.0) and later accept data URIs, that's not the case in all other browsers.
Worker( in DOMString aStringURL );
- The URL of the script the worker is to execute. It must obey the same-origin policy (or be a data URI for Gecko 10.0 or later).
A new Worker.