query string parameter value assign to local variable

[Paolo Vaca]

I need to assign the value of a query string parameter to an app.local variable.  this value could change for each page.

For instance:

?bundle=true

sets 

app.local.bundle = true

or

req.local.bundle = true

However, if i use middleware to use to set this value:

request.query.bundle

It will grab the query string on that first request, subsequent requests to the app, such as a JS file, will not include the query string and now the value gets overwritten or lost.

Is there a way to grab the query string value only for that first page/document request, and then ignore all other requests made to the application, until the next page load.

Or perhaps there is another way of accomplishing this

thanks