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node_modules/style-loader/lib/addStyleUrl.js 1 KB
aaac7fed   liuqimichale   add
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  /*
  	MIT License http://www.opensource.org/licenses/mit-license.php
  	Author Tobias Koppers @sokra
  */
  
  function addAttrs (element, attrs) {
  	Object.keys(attrs).forEach(function (key) {
  		element.setAttribute(key, attrs[key]);
  	});
  }
  
  module.exports = function addStyleUrl (url, options) {
  	if (typeof DEBUG !== "undefined" && DEBUG) {
  		if (typeof document !== "object") throw new Error("The style-loader cannot be used in a non-browser environment");
  	}
  
  	options = options || {};
  
  	options.attrs = typeof options.attrs === "object" ? options.attrs : {};
  
  	options.hmr = typeof options.hmr === 'undefined' ? true : options.hmr;
  
  	var link = document.createElement("link");
  
  	link.rel = "stylesheet";
  	link.type = "text/css";
  	link.href = url;
  
  	addAttrs(link, options.attrs);
  
  	var head = document.getElementsByTagName("head")[0];
  
  	head.appendChild(link);
  
  	if (options.hmr && module.hot) {
  		return function(url) {
  			if(typeof url === "string") {
  				link.href = url;
  			} else {
  				head.removeChild(link);
  			}
  		};
  	}
  }