Make d3 data functions use promises instead of callbacks
This library uses ES6 Promise. (http://www.html5rocks.com/en/tutorials/es6/promises/) To bring browsers that lack a complete promises implementation up to spec compliance, or add promises to other browsers and Node.js, check out the polyfill (2k gzipped).
bower install d3.promise
This library can be imported using standard <script> as well as AMD (such as RequireJS).
var promise = d3.promise.csv('test.csv');
promise.then(function(data){}, function(error){});
var promise = d3.promise.tsv('test.tsv');
promise.then(function(data){}, function(error){});
var promise = d3.promise.json('test.json')
promise.then(function(data){}, function(error){});
var promise = d3.promise.html('test.html')
promise.then(function(data){}, function(error){});
var promise = d3.promise.text('test.txt')
promise.then(function(data){}, function(error){});
var promise = d3.promise.xml('test.xml')
promise.then(function(data){}, function(error){});
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