This is an old Readme and lot's of features are missing documentation.
I assail my code with assertions and sometimes an assertion is wrong while the code itself is fine.
For these cases I don't want assert to stop execution in production.
Still, an exception is thrown in a setTimeout so that error logging can still be used.
In dev (window.location.hostname==='localhost' or process.env['NODE_ENV'] !== 'production') require('reassert') behaves like expected and stops execution.
Check the source code for more information, it's only couples of lines.