TypeScript import issue

[stevenmusumeche]

I'm getting the following TypeScript error when using this library:

Cannot use 'new' with an expression whose type lacks a call or construct signature.'
source: 'ts'

import * as winston from 'winston';
import * as WinstonCloudWatch from 'winston-cloudwatch';

let logger = new winston.Logger({
    transports: [
        new WinstonCloudWatch({
            level: process.env.LOG_LEVEL,
            timestamp: true,
            awsRegion: 'us-east-1',
            logGroupName: process.env.AWS_LOGS_GROUP,
            logStreamName: process.env.ENV
        })
    ]
});

[lazywithclass]

I'm not familiar with TypeScript, the support has been added as a PR, but I will surely have a look into it; any pointers / hints would be greatly appreciated!

[stevenmusumeche]

I'm pretty new to it as well. This was the only library where I had an issue like this so I thought I would create an issue.

[lazywithclass]

@stevenmusumeche How can I replicate this? Could you please provide a minimum setup?

I am not sure if it's just a matter of creating a .ts file with that code at the root of the project.

[stevenmusumeche]

I believe if you create a server.ts file in the root of the project and put the code above you will see the same error from TypeScript.

[lazywithclass]

@stevenmusumeche I've some errors doing what you suggested so I created a new repo, this way I can clearly see what's the minimum required configuration and point future users with the same problem to it.

What's the command I should use to see the error? tsc server.ts gives a lot of errors like

node_modules/aws-sdk/clients/dynamodb.d.ts(309,38): error TS2304: Cannot find name 'Buffer'.
node_modules/aws-sdk/clients/dynamodbstreams.d.ts(92,38): error TS2304: Cannot find name 'Buffer'.
node_modules/aws-sdk/clients/ec2.d.ts(2667,23): error TS2304: Cannot find name 'Buffer'.
node_modules/aws-sdk/clients/ecr.d.ts(612,31): error TS2304: Cannot find name 'Buffer'.
node_modules/aws-sdk/clients/firehose.d.ts(144,22): error TS2304: Cannot find name 'Buffer'.
node_modules/aws-sdk/clients/glacier.d.ts(1116,24): error TS2304: Cannot find name 'Buffer'.

...but in the end it creates the .js file. Any help would be greatly appreciated.

[stevenmusumeche]

That is the command, but those errors are probably related to not having the typings installed for winston. npm install @types/winston should fix that.

However, I redid my setup to use npm scripts instead of gulp, and it appears I am no longer getting this error, so it may have been my error all along.

I do apologize for raising an unnecessary issue and wasting your time.

[lazywithclass]

Ah no worries for that :)

I appreciate you coming back here and telling me so!