getting jquery like sytax from a node module

Question

I'm building my first node module, and I'm hoping to get something akin to jQuery

$(searchItem)

so the code could look something like

var $$ = require("myModule");

$$(search).doAction();

and the like, rather than

$$.doAction(search);

Is it possible to return a "root function" like this in a module? Are than any dangers in doing so?

------------------Update Laurent says it's doable as Underscore does it, and that it's safe, now for the how??----------------------------------

I've updated my code to my module starting with a self-referencing function (copied underscore)

(function(){
var fs = require("fs");
    console.log("starting");
    var root = this;
    var config =JSON.parse(fs.readFileSync("./config.json"));
    var $$ = function(obj){
        if(!obj){
            return config;
        } else {
            return obj;
        }
    }
}).call(this)

Then in my js page

require("myModule");
console.log($$("test"));

Hoping the the console would log "test", but unfortunately I'm getting $$("test") is not a function. ------------------------------------ update ------------------------------------------- As jtblin pointed out in the answers below, exporting module.exports = $$ works for outputing "test" as test is being passed to the function, but I can't chain methods as per the original example. Part way there though.

Answer 1

Have you exported your function?

In your module:

module.exports = $$;

In another file

var $$ = require("myModule");
console.log($$("test"));

Answer 2

Underscore is one of the most widely used node.js modules and it does exactly that, so it's pretty safe.