LSEG Data Library for TypeScript

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onError

Attaches an event handler function to the stream, which will be called when an error message is received for some of the requested instruments.

Syntax

stream.onError(callback: OMMStreamErrorCb)

Parameters

Value Description Data type Optional Default value
callback OMMStreamErrorCb function (see OMMStream.Event). function No -

Returned value

The current OMMStream object.

Usage

The following example demonstrates how to display messages received when a data retrieval error happens:

const stream = Delivery.OMMStream.Definition({
    name: 'EUR=',
    fields: ['DSPLY_NAME']
}).getStream();

await stream
    .onError((error, stream) => console.log(error, stream))
    .open();
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