SO-39207181

by David Thomas

HTML

<span data-mo-top-fade-duration="600">Title 1</span>
<span data-mo-bottom-fade-duration="600">Title 2</span>
<span data-mo-right-fade-duration="600">Title 3</span>
<span data-mo-left-fade-duration="600">Title 4</span>

CSS

.hasAttributeStartingWith {
  display: inline-block;
  font-size: 1.5em;
  color: limegreen;
}

JavaScript

function hasAttributeStartingWith(node, attr) {
  return Array.from(node.attributes).filter(function(attributeNode) {
    return attributeNode.nodeName.indexOf(attr) === 0;
  }).length > 0;
}

Array.from(document.querySelectorAll('span')).forEach(function(span) {
  if (hasAttributeStartingWith(span, 'data-mo')) {
    span.classList.add('hasAttributeStartingWith');
  }
});