What's going on here? (code and errors)

General
1

I'm stuck on a problem with context and and trying to check things.

To that end this is a bit of code I wrote

let x = context.get("test") || 0;

if (msg.payload == "x")
{
    context.set("test",1)
}
else
if (msg.payload == "y")
{
    context.set("test",0)
}
let msg.payload = x;
return msg;

But I'm seeing/getting errors with the msg.payload lines.

Errr..... Why?

See included picture:

Screenshot from 2025-03-04 21-52-24
Screenshot from 2025-03-04 21-52-24733Ă—356 22.9 KB

2

Msg is already defined, so no need for the let

2 Likes
3

Thanks.

Shows how bad I've got with being away from coding for a while.

(That solved it.)

(No button to indicate that so sorry.)

4

Couple of reminders.

  • Use const instead of let if you aren't going to change a variable.
  • Don't use || if your context might contain something true/false looking - such as your 0 and 1. Use ?? instead which is safer.
  • Be consistent with the use of ; - either do or don't but preferably don't mix. It will catch you out eventually.

And have fun! :smile:

1 Like
5

Yeah, thanks.

That is another thing I need to instil with myself.

But I am (for now) getting rid of all the var and making them let.

Then I need to check if I can make them const.
(Which I have done with some already.)

It is just a long painful thing, and I've been out of programming for a few months.
:crying_face: