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    <p>You can change function scope using <code>toString()</code> and the dreaded <code>eval</code>.</p> <p>If your functions were in say lib.js as follows:-</p> <pre><code>var lib = {} lib.foo = function() { console.log(var1) } lib.bar = function() { console.log(var2) } module.exports = lib </code></pre> <p>In main.js you could have this:-</p> <pre><code>var var1 = 1 var var2 = 2 var ob1 = require('./lib') ob1.foo() ob1.bar() </code></pre> <p>When you run it the ob1.foo() line gives a ReferenceError, var1 is not defined. This is because the scope of foo() comes from lib.js and not your main js file, and var1 is invisible to it. ob1.foo is a reference to a function with lib.js scope. You need to make a new reference with main.js scope.</p> <p>To do this convert each function to string and eval it. That will create a new function with the same code but with main.js scope. Here's one way using a setMainScope method which loops through all the functions changing their scope to main.js.</p> <pre><code>var var1 = 1 var var2 = 2 var ob1 = {} ob1.setMainScope = function(ob2) { for(var prop in ob2) { if( !ob2.hasOwnProperty(prop) ) {continue} if( typeof ob2[prop] !== 'function' ) {continue} this[prop] = eval( "(" + ob2[prop].toString() + ")" ) } } ob1.setMainScope( require('./lib') ) ob1.foo() // 1 ob1.bar() // 2 </code></pre> <p>Now it all works nicely except <code>eval</code> was used. The scope of <code>foo()</code> and <code>bar()</code> is now main.js and so they 'see' <code>var1</code> and <code>var2</code>.</p>
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    1. PONodeJS Functions/Module Include Scope
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    1. USJohn Middlemas
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