[ts] Property 'createLogger' does not exist on type '{}'.

Please tell us about your environment:

• winston version?
  • winston@2
  • winston@3
• node -v outputs:
• Operating System? macOS
• Language? ASP.NET Core, TypeScript 2.9.1, es5, ReactJS

What is the problem?

After installing ASP.NET Core with React.js

dotnet new react

And add the getting-started example for either winston3 or winston2 on Home.tsx

import * as React from 'react';
import { RouteComponentProps } from 'react-router';
const winston = require('winston');
const logger = winston.createLogger({
    transports: [
         new winston.transports.Console(),
        new winston.transports.File({ filename: 'combined.log' })
    ]
 });

 logger.log({
     level: 'info',
     message: 'Hello distributed log files!'
 });

I’m seeing compilation errors from TypeScript.

What do you expect to happen instead?

I’m expecting to be able to log to Console and File.

{"level":"info","message":"Hello distributed log files!"}

Other information

My tsconfig.json:
{
    "compilerOptions": {
    "baseUrl": ".",
    "module": "es2015",
    "moduleResolution": "node",
    "target": "es5",
    "jsx": "react",
    "sourceMap": true,
    "skipDefaultLibCheck": true,
    "strict": true,
    "types": ["webpack-env"]
 },
 "exclude": [
    "bin",
    "node_modules"
  ]
}

I can fix the TypeScript error by defining

const winstonType: any = winston;

const logger = winstonType.createLogger({
    transports: [
       new winstonType.transports.Console(),
       new winstonType.transports.File({ filename: 'combined.log' })
   ]
});

But then get errors:

Module not found: Error: Can't resolve 'fs' in '/hello-logging-winston/node_modules/winston/lib/winston' Module not found: Error: Can't resolve 'fs' in '/hello-logging-winston/node_modules/winston/lib/winston/transports'

I’ve since found that ReactJS is not supported but is on the v3 roadmap. According to https://github.com/winstonjs/winston/issues/900, I must use import * as winston from 'winston' in order to get all exports.

That fixes the compiler issues I was getting. However, I am still getting the errors Module Not Found Can't resolve 'fs' ...

[DABH]

Btw if you add the following to your webpack config, it seems the console transport at least works. But the point is you just ignore the fs module…

node: {
    fs: 'empty'
}

This worked for me in a test webpack project with the console transport. Good luck!

[ArpithaGMGowda]

i am getting this error .

ERROR in ./node_modules/winston/dist/winston/tail-file.js Module not found: Error: Can’t resolve ‘fs’ in ‘C:\Users\703247433\Desktop\winstontoolkit\toolkit\node_modules\winston\dist\winston’ ERROR in ./node_modules/winston/dist/winston/transports/file.js Module not found: Error: Can’t resolve ‘fs’ in ‘C:\Users\703247433\Desktop\winstontoolkit\toolkit\node_modules\winston\dist\winston\transports’