resume property for blocked events

[brettz9]

Hi,

I'm not in particular need of this since I'm working more with db.js, but just in examining your nicely modular projects, I thought I'd share a novelty I added to db.js for blocked connections that you might find of use.

Within the db.js open request (and the delete one which also has a couple of other browser bug workarounds you may be interested in), you should see a resume property we add to the onblocked error object so that the user can, as per our README open docs, recover from a blocked event with a promise catch followed by a then.

[alekseykulikov]

This resume feature is really nice, thank you for sharing!

[brettz9]

Sure... If versionchange handlers have already been set up and if they close their own connections, there will be no blocked event, so by using best practice, there shouldn't be too much of a need for this, I think but if one wants to control the behaviors at the point of making the open request, it may come in handy.