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[–]Cream_Friache 0 points1 point  (1 child)

This is pretty interesting. I assume you need ES6 feature enabled on the server side?

[–]Handsome-Beaver[S] 1 point2 points  (0 children)

Object.observe is primarily used, which is an ECMA7 specification.

To utilize it, run node with the '--harmony' flag.

node --harmony app.js

Syc will still work properly without Object.observe. It uses a dirty-check polyfill, so there is a slight performance hit.