[BUG] ICustomProperties does not support setting values

[onionhammer]

According to the docs we should be able to assign custom values like this:

var telemetryInitializer = (envelope) => {
  envelope.data.someField = 'This item passed through my telemetry initializer';
};

However in the typescript definition, 'envelope.data' is an empty interface, which does not allow any extension.

[MSNev]

Hi,
It looks from the error, that you don't have an IEnvelope which defines the "data" element as any...

A TelemetryInitializer is passed an object that conforms to the IEnvelope interface...
Can you provide more of the code as the following works for me

var telemetryInitializer = (envelope) => {
envelope.data.someField = 'This item passed through my telemetry initializer';
};
appInsights.addTelemetryInitializer(telemetryInitializer);
appInsights.trackTrace({message: 'This message will use a telemetry initializer'});

Cheers

Nev

[MSNev]

I think I have a possible solution for this, but as the issue is really just with the type safety (and perhaps strict) a workaround you could apply is to create a local variable for data and "cast" (in typescript terms) to any or some other type you want to enforce.

[MSNev]

Fixed deployed as NPM and next CDN channels

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.