modernizr/src/isSVG.js

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

define(['docElement'], function(docElement) {
  /**
   * A convenience helper to check if the document we are running in is an SVG document
   *
   * @access private
   * @returns {boolean}
   */
  var isSVG = docElement.nodeName.toLowerCase() === 'svg';

  return isSVG;
});