modernizr/feature-detects/dom/dataset.js

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

/*!
{
  "name": "dataset API",
  "caniuse": "dataset",
  "property": "dataset",
  "tags": ["dom"],
  "builderAliases": ["dom_dataset"],
  "authors": ["@phiggins42"]
}
!*/
define(['Modernizr', 'createElement'], function(Modernizr, createElement) {
  // dataset API for data-* attributes
  Modernizr.addTest('dataset', function() {
    var n = createElement('div');
    n.setAttribute('data-a-b', 'c');
    return !!(n.dataset && n.dataset.aB === 'c');
  });
});