Have a function from a module be exported in another module?

Question

I have a fairly large function in my module (./myMainModule.js) that I would like to be packaged in a separate module (./mySubModule. I'm trying to figure out how to require(mySubModule) and then have a function from mySubModule be used as a function in myMainModule.

I've tried to export

mainFunction: mySubModule.subFunction(params),

but it's saying the params are not defined.

//myMainModule.js
const mySubModule = require("./mySubModule)

module.exports = {
   mainFunction: mySubModule.subFunction(params),
}



//----------

//mySubModule.js

module.exports {
  subFunction: function(params) {
     console.log(params);
  }
}

I'm getting params is not defined when assigning the function in myMainModule.

An = is missing in mySubmodule... it should be module.exports = { — Pipe
– Pipe, Commented Jul 23, 2019 at 20:37
Don't call the function (with what params value?) when you want to export the function itself, not the result of a call. — Bergi
– Bergi, Commented Jul 23, 2019 at 21:43

masautt · Accepted Answer · 2019-07-24 18:40:35Z

1

const subModule = require("./subModule");

module.exports = {
     mainFunction: subModule.subFunction,
     // This works ^^

     //mainFunction : subModule.subFunction(params),
     // Not this ^^

}

My linter was complaining that my params were not defined. I was actually calling the function when I should have been just referencing it. I did not need to worry about the parameters.

I was actually calling the function and that's why my linter was saying my params were not defined.

edited Jul 24, 2019 at 18:40

answered Jul 24, 2019 at 0:31

masautt

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2 Comments

Nagama Inamdar Over a year ago

Welcome to Stackoverflow. Would you mind extending your answer for fellow programmers; who might understand how it helps to solve the problem.

App Dev Guy Over a year ago

This answer has been flagged as potentially low-quality. Please elaborate on your answer and why you think it solves the OP's question so that new and future developers understand it better. - From Review

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