Adding WebSocket to Webserver - websocket

Question

I'm trying to add websocket to my webserver by simply following this guide using a Beaglebone:
https://www.w3schools.com/nodejs/nodejs_raspberrypi_webserver_websocket.asp
However, I'm getting this error:
tugbars#beaglebone:~$ sudo node webserver1.js
/home/tugbars/node_modules/ws/lib/websocket.js:347
...options
^^^
SyntaxError: Unexpected token ...
at createScript (vm.js:56:10)
at Object.runInThisContext (vm.js:97:10)
at Module._compile (module.js:549:28)
at Object.Module._extensions..js (module.js:586:10)
at Module.load (module.js:494:32)
at tryModuleLoad (module.js:453:12)
at Function.Module._load (module.js:445:3)
at Module.require (module.js:504:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (/home/tugbars/node_modules/ws/index.js:3:19)
I think the problem is at
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.3/socket.io.js"></script>
this part but I couldn't figure out how to solve it.Thanks for help.
Extra information. I have downloaded socket.io as sudo. When i type npm list socket.io, I'm getting the version of the installed socket.io. Node is also at it's last version.

Answer 1

You almost certainly have an outdated version of Node that doesn't have support for the spread operator (foo = { ...options }) or for destructuring (const { x, ...options } = foo). Update to a newer version of Node (12.14.1 is the latest stable release).
Also, you mention “downloading socket.io as sudo”, possibly referring to installing the node module, but you also shared an HTML script tag showing a Cloudflare hosted version. You might want to make sure you understand how you're loading that library before proceeding.