Here is my Instructable on how to start Blynking using JavaScript:
Blynk + JavaScript in 20 minutes [Raspberry Pi, Edison, Espruino …]
Please post here your questions, comments, and how to improve this article 
Happy Blynking!
Does the webpage example work in a browser? I tried it with Firefox 42 and only get an empty page. Changed the Authtocken mine but nothing happens in the app.
No, the webpage.html example doesn’t work yet.
Server needs to open WebSocket (it’s not there yet).
How did it go with other examples?
Is there a documentation for the syntax of the widgets?
Hello Blynk,
Any update on WebSocket support on the server side yet? I manage to run the nodeJS sample and it looks impressive, and then starting the .html sample, but as you said few months ago still not being enabled. If there is any way to configure local server to try this, please let me know… (even if un-tested).
Many thanks!
Sorry for the necro, but as I’m currently looking into what hardware-software combination to get: Is this still possible with the new Blynk Version and an Espruino Pico?
It is possible but it may require some minor updates to the JS code