"Full" sample of IndexedDB in action

After a bit more sweat and tears, I’ve now got a “full” (if ugly) example of an IndexedDB application. It allows you to create and delete simple notes. You can view this demo here:

http://www.raymondcamden.com/demos/2012/apr/30/test5.html

Right now this demo is Firefox only. It doesn’t work in Chrome because of the bug I mentioned in my earlier blog post. Here’s the code - and again - I want to mention (and credit) the excellent MDN tutorial for making this easier to build.

Nothing too scary, right? Using method chaining makes the code a bit more palatable and simpler to work with.

After getting this working, I began to look at how you can retrieve data. I guess I shouldn’t be surprised (and @thefalken pointed it out to me), but you are limited to primary key lookups only.

So let me make sure that is clear. This is not a replacement for WebSQL. You cannot search. I guess - technically - you could search if you load everything up and iterate over it, but that’s not really efficient. You can do range based filters, so for example, given a set of names I could go from Bob to Mary, but if I wanted to quickly find all the objects with property X set to Y and property Z set to A, then I’m out of luck. I was really thinking this was a Mongo-ish type solution, but I was wrong.

I don’t know about you - but this is kind of disappointing. Maybe my opinion will change, but right now I’m sad that WebSQL is being dumped for this.

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About Raymond Camden

Raymond is a developer advocate for Extend by Auth0. He focuses on serverless and enterprise cat demos. If you like this article, please consider visiting my Amazon Wishlist or donating via PayPal to show your support.

Lafayette, LA https://www.raymondcamden.com

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