TypeError: _qz.websocket.connection.sendData is not a function

[Wai-Sun Chia]

Guys,

I'm getting this error after a period of not working on this print module for 1-2 months. Previously it was working fine...

The demo works though!!!

So I'm at a lost of what to look out for..

Throw me a bone guys..

[Tres Finocchiaro]

This generally means that there is a race condition.  For example, you may be calling qz.printers.find(...) before qz.websocket.connect() has finished.

To fix this, you need to use a proper promise chain.

Here is an example: https://qz.io/wiki/2.0-getting-started#chaining-requests

- Tres.Fin...@gmail.com

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[Praveen Sharma (Elegance Services Pvt Ltd)]

t.websocket.connection.sendData is not a function 

[Lite Finocchiaro]

Praveen:

This email thread is seven years old. If you have a question, please start a new thread.

Kind regards,

Lite Finocchiaro

VP, QZ Industries

To view this discussion visit https://groups.google.com/d/msgid/qz-print/0d0d5a57-59ed-44ac-bfe9-a7488860387an%40googlegroups.com.

[Tres Finocchiaro]

t.websocket.connection.sendData is not a function 

This can happen as a result of a race condition or a websocket disconnection.

Here's a code snippet that will check for an active connection before printing:

https://gist.github.com/tresf/42a8f25124840a6c496b#file-connectandprint-js-L22-L35