create-js-app-scripts/node_modules/assets-webpack-plugin/lib/getFileExtension.js

Configuration and scripts for Create Js App.

var URL = require('url');
var path = require('path');

module.exports = function getFileExtension (asset) {
  var url = URL.parse(asset);
  var ext = path.extname(url.pathname);
  return ext ? ext.slice(1) : '';
};