javascript - correct way to call D3.js object in Drupal module

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I am trying to visualize a network using D3 with Drupal 7.x and I don't know what is the right way to refer to D3 within my js file.

So far I can build the json and use a render array to pass it to my js script (and show it in console), but then I fail calling D3.js:

Uncaught ReferenceError: d3 is not defined

Here's my js code so far:

(function($)
 Drupal.behaviors.mymodule = 
 attach : function(context, settings) 
 if(Drupal.settings.mymodule.graph_json !== '')
 // visualize the json
 console.log(Drupal.settings.mymodule.graph_json);
 // create the newtork
 d3.json(Drupal.settings.mymodule.graph_json, function (error, json) 
 if (error)
 return console.warn(error);
 
 );
 
 
 ;
(jQuery));

Should I add a reference in the array? Or since D3.js is in sites/all/libraries/d3 then there is a common way to call it?

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