AMD module that extracts data attributes from script tag that contains data-main attribute and returns an object containing all of the data values.

data.js

/*
 * @description Extracts data attributes from script tag that contains data-main attribute
 * and returns an object containing all of the data values.
 * @author Tauren Mills (github.com/tauren)
 */
define(function() {

  // Get all of the script tags
  var scripts = document.getElementsByTagName('script');
  var data = {};

  // Iterate through the script tags in reverse
  for (var i = scripts.length-1; i>0; i--) {
    // Get all attributes of the tag
    var attrs = scripts[i].attributes;
    // Check if the data-main attribute exists
    if (attrs && attrs['data-main']) {
      // Iterate all attributes
      for (var attr, i=0, l=attrs.length; i<l; i++) {
          // Get an attribute
          attr = attrs.item(i);
          // Check if it is a data- attribute
          if(/^data-/.test(attr.name)) {
            // Remove 'data-' from the name and add the
            // name/value pair to the results
            data[attr.name.split('-')[1]] = attr.value;
          }
      }
      // Break out early, retuning the found data
      return data;
    }
  }
  // No data was found, return empty object
  return data;

});

fancy.html

<script
  data-main="/fancy/js/main" 
  data-app="FancyApp" 
  data-token="abcdef" 
  data-env="dev" 
  src="/libs/requirejs/require.js">
</script>

main.js

// Main module, located in fancy/js/main.js 
requirejs.config({
  baseUrl: '/',
  paths: {
    'data': 'common/js/data',
  }
});

require(['data','fancy/js/other'], function(data, other) {
  console.log('data attributes',data);
  other.run();
});

other.js

// Other module, located in fancy/js/other.js 
define(['data'], function(data) {
  return {
    run: function() {
      console.log('Running '+data.app+' in '+
        data.env+' mode with token '+data.token);
    }
  }
});