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function() {
// Update this array with the class names
var classes = ['class1', 'class2', 'class3'];
// Fetch elements
var els = document.querySelectorAll('.' + classes.join(',.'))
return [], function(e) {
// Get first matching class name per element
return classes.filter(function(c) {
return e.className.indexOf(c) > -1;
}).filter(function(v,i,s) {
// Remove duplicates
return s.indexOf(v) === i;
}).sort(function(a, b) {
// Sort in alphabetical order
if (a > b) return 1;
if (a < b) return -1;
return 0;
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