1.3.1Scripts and UDIXes - web workers

Scripts and UDIXes run as web workers. Therefore, there is no web page for them to interact with, and web workers also don't have access to some browser features such as localStorage. But, because they are web workers, scripts and UDIXes can use importScripts() to include external code - subject to standard browser security as described below.

Widgets, scripts, and UDIXes can create web workers to offload complex tasks (in the case of scripts and UDIXes, web workers creating other web workers). In other words, the browser environment makes it possible to have fully multi-threaded processing, with time-consuming tasks done in the background.