code: function insertContentIntoPlaceholder(node, content) {
  	const state = {replaced: false};
  
  	node.value = replacePlaceholder(node.value, content, state);
  	node.attributes.forEach(attr => {
  		if (attr.value) {
  			node.setAttribute(attr.name, replacePlaceholder(attr.value, content, state));
  		}
  	});
  
  	return state.replaced;
  }
docs: Inserts given `content` into placeholders for given `node`. Placeholders
  might be available in attribute values and node content
  @param  {Node} node
  @param  {String} content
  @return {Boolean} Returns `true` if placeholders were found and replaced in node