React 16 support

[anmonteiro]

This supersedes #883

[anmonteiro]

I don't know if this is ready to be merged yet.

I'm tracking down what seems like missing externs, as our app is misbehaving with advanced compilation.

[swannodette]

Ok ready for this when you are.

[anmonteiro]

There's still an issue here, which breaks this line:

om/src/main/om/core.cljs

Line 903 in bc1c30f

(let [factory (js/React.createFactory (js/React.createClass rdesc))]

because React.createClass is not in React 16 anymore.

I didn't fix it because I was lazy.

We can either fix it in another PR or bring in create-react-class from CLJSJS solely for that namespace.

[anmonteiro]

Other than that I fixed the needed externs issues

[anmonteiro]

Also need to fix some server-side rendering stuff. We don't need to generate checksums or React IDs anymore

[dupuchba]

@anmonteiro can you plz explain why checksum/ids are not needed anymore ?
Plus, do you need help for this PR ?

[anmonteiro]

@dupuchba from https://reactjs.org/blog/2017/09/26/react-v16.0.html

In addition, React 16 is better at hydrating server-rendered HTML once it reaches the client. It no longer requires the initial render to exactly match the result from the server. Instead, it will attempt to reuse as much of the existing DOM as possible. No more checksums!

[ItamarShDev]

Is there a plan to create a new version containing it?

[dark4eg]

@ItamarShDev

lein install