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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
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I'm quite surprised by the [benchmarks versus Automerge JS & Rust](https://github.com/jackyzha0/bft-json-crdt#benchmarks) when it comes to memory:
> Ours (Basic) 27.6MB
> Ours (BFT) 59.5MB
> Automerge (Rust) 232.5MB
I would expect adding the public key tracking to use more memory; I wonder how Automerge is spending so much more memory. Possibly on a bunch of internal caches or memoization that give the order-of-magnitude improvement in speed?
> Ops: 100k
> Ours (Basic) 9.321s
> Ours (BFT) 38.842s
> Automerge (Rust) 0.597s
Check out this implementation of hash-stable trees. The same dataset generates the same Merkle hash, regardless of insertion orders. This makes verifiable sync computationally efficient. https://github.com/mikeal/prolly-trees
This is a cool idea, but I didn't find any examples of max length constraints or other normalization rules in the source code I reviewed. Maybe there's something in there.
Here's some source code for an early, work-in-progress Wiki CRDT: https://github.com/hyperhyperspace/wiki-collab/blob/master/s...
Page in the Wiki. Note that data types have a validate method that returns true or false; maybe if false, they're just dropped from the UI? Not sure how the method is used. https://github.com/hyperhyperspace/wiki-collab/blob/master/s...
I haven't found the underlying text or rich text CRDT implementation yet.