module.exports vs exports in Node.js

Question

I\'ve found the following contract in a Node.js module:

module.exports = exports = nano = function database_module(cfg) {...}

I wonder what

Answer 1

Here is the result of

console.log("module:");
console.log(module);

console.log("exports:");
console.log(exports);

console.log("module.exports:");
console.log(module.exports);

Also:

if(module.exports === exports){
    console.log("YES");
}else{
    console.log("NO");
}

//YES

Note: The CommonJS specification only allows the use of the exports variable to expose public members. Therefore, the named exports pattern is the only one that is really compatible with the CommonJS specification. The use of module.exports is an extension provided by Node.js to support a broader range of module definition patterns.