node.js using function from another js file

Question

How to use the function from another js file .

example:

The master.js file contain the following code.

 if(typeof(CONVERTER) == "undefined") var CONVERTER = {};
    (function(_e) {
      "use strict";
      var synmonth = 29.530588853;     //synodic month (new Moon to new Moon)
      var ptsa = new Array(485, 203, 199, 14, 12, 12, 12, 9, 8)
      var ptsb = new Array(324.96, 337.23,320.81, 227.73, 15.45)
      var ptsc = new Array(1934.136, 4777.259, 1222.114, 16859.074)

    function GetAdjusted(yea,mx,dx){
    .......
     return(result);
    }

      _e.GetAdjusted = function(yea,mx,dx) {
        return GetAdjusted(yea,mx,dx);
      };
    }(CONVERTER));

How to use/declare the function in another js file using node.js

I'm getting an error TypeError: Object #<Object> has no method 'GetAdjusted'. But if I deploy above code in web base is working fine. — perlbie
– perlbie, Commented Jul 22, 2015 at 4:43
You are probably not creating the module correctly. Did you follow the examples in the link? — Felix Kling
– Felix Kling, Commented Jul 22, 2015 at 4:47
The module created by another developer. I'm just a user. But I don't see any "exports" keyword in the master.js, Does it means the code ONLY suitable use in web not for node.js ? — perlbie
– perlbie, Commented Jul 22, 2015 at 4:52
Hi; Felix Kling, Thanks. By adding the "module.exports.GetAdjusted=GetAdjusted" solve the problem — perlbie
– perlbie, Commented Jul 22, 2015 at 5:16

dreamingblackcat · Accepted Answer · 2015-07-22 08:13:51Z

1

Your code is probably extracted from a Frontend module. Assuming you want to use the getAdjusted function which have CONVERTER as dependency. You can write as following:

"use strict";

module.exports = function(CONVERTER){
  if(typeof(CONVERTER) == "undefined"){
    CONVERTER = {};  
  } 
  var synmonth = 29.530588853;     //synodic month (new Moon to new Moon)
  var ptsa = new Array(485, 203, 199, 14, 12, 12, 12, 9, 8);
  var ptsb = new Array(324.96, 337.23,320.81, 227.73, 15.45);
  var ptsc = new Array(1934.136, 4777.259, 1222.114, 16859.074);

  var getAdjusted = function getAdjusted(yea,mx,dx){
   // your code here
   return(result);
  };

  return getAdjusted;
};

In order to use it from another file

//Assuming your CONVERTER object exists and pass it into require
var getAdjusted = require("/path/to/your/file")(CONVERTER);

// use it. Assuming yea, mx, dx exists.
getAdjusted(yea,mx,dx);

answered Jul 22, 2015 at 8:13

dreamingblackcat

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1 Comment

Crann Moroney Over a year ago

I don't understand what does the (CONVERTER) mean at the end of the require statement

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