code: function buildElementIdentifier(element) {
  			if (element.id) {
  				return `#${element.id}`;
  			}
  			let identifier = element.tagName.toLowerCase();
  			if (!element.parentNode) {
  				return identifier;
  			}
  			const siblings = getSiblings(element);
  			const childIndex = siblings.indexOf(element);
  			if (!isOnlySiblingOfType(element, siblings) && childIndex !== -1) {
  				identifier += `:nth-child(${childIndex + 1})`;
  			}
  			return identifier;
  		}
docs: Build a unique CSS element identifier.
  @private
  @param {HTMLElement} element - An element to get a CSS element identifier for.
  @returns {String} Returns the CSS element identifier as a string.