Node Js and Typescript call global function with parameters

Question

I have a logger function in logger.ts

export const Logger=(message:string, module?:string, method?:string)=>{
    console.log(`${module} ${message}`)
}

In types/global.d.ts

declare global {
    var Log: any;
}
export {}

In index.ts

import { Logger } from './src/utils/logger';
global.Log=Logger;
global.Log("Hello world");

It works without any problem. But in global.Log i can't see the parameters and intellisense not working.

How can I see parameters for global.Log?

NG235 · Accepted Answer · 2022-07-20 00:12:31Z

1

I believe Intellisense is not working because the variable Log is of any type. Try defining global as below:

declare global {
    var Log: (message: string, module?: string, method?: string) => void;
}
export {};

Intellisense will need a specific type (not any or unknown) in order to suggest parameters.

Also, there is no need to prefix Log with global (i.e. global.Log) as Log is in the global context (accessible from anywhere), and it is not possible to use global.Log - global is not a variable.

answered Jul 20, 2022 at 0:12

NG235

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3 Comments

BK52 Over a year ago

Global object defined in Node Js and you can reach it from everywhere. For details

BK52 Over a year ago

If I use without global, I got an error ReferenceError: Log is not defined.

BK52 Over a year ago

Finally I use global.Log when I assign the method. Otherwise I can directly use Log.

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