text: // For adding rules to an existing <style> tag.
  ;(function() {
  	const $ = require("jquery");
  
  	// Append a style rule to the style tag with the specified ID.
  	function append(id, css) {
  		const $element = $(`#${id}`);
  		if ($element) {
  			const $parent = $element.parent();
  			const oldCSS = $element.html();
  			$element.remove();
  			$(`<style type='text/css' id='${id}'>${oldCSS}\n${css}</style>`).appendTo("head");
  		}
  	}
  
  	module.exports = {
  		append
  	};
  }());
  