Please try following:

File func.js:
=========================

function SampleFunc() {
    this.ale = 1;
    this.ale2 = {
        f: 2,
        f1: 3
    };
    this.bar = function () {
        return new Date();
    };
}

module.exports = SampleFunc;


File main.js:
==========================
var o3 = require("func");
new o3().bar();


If you Ctrl+Click on the bar() call in main.js, it should navigate to the method declaration in func.js. It works in following case

var x = new o3(); x.bar();


Thank you


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