JavaScript中模板方法单例的实现实例

<p id="content"></p>

  //格式化字符串方法
  function fromateString(str, data) {
   return str.replace(/\{#(\w+)#\}/g, function(match, key){
    return typeof data[key] === undefined ? '' : data[key]
   });
  }
  //基础导航
  var Nav = function (data) {
   //基础导航样式模板
   this.item = &#39;<a href="{#href#}" rel="external nofollow" title="{#title#}">{#name#}</a>&#39;;
   //创建字符串
   this.html=&#39;&#39;;
   for (var i = 0; i < data.length; i++) {
    this.html += fromateString(this.item, data[i]);
   }
   return this.html;
  }
  //带有信息提示信息导航
  var NumNav = function (data) {
   //消息提醒小心组件模板
   var tpl = &#39;<p>{#num#}</p>&#39;;
   for (var i = data.length -1; i >= 0; i--) {
    data[i].name += data[i].name + fromateString(tpl, data[i]);
   }
   return Nav.call(this, data);
  }
  //带有链接地址的导航
  var LinkNav = function (data) {
   //消息提醒小心组件模板
   var tpl = &#39;<span>{#link#}</span>&#39;;
   for (var i = data.length -1; i >= 0; i--) {
    data[i].name += data[i].name + fromateString(tpl, data[i]);
   }
   return Nav.call(this, data);
  }

  //测试带有信息提示的导航
  var nav = document.getElementById(&#39;content&#39;);
  nav.innerHTML = NumNav([
   {
    href : &#39;www.baidu.com&#39;,
    title : &#39;百度一下你就知道&#39;,
    name : &#39;百度&#39;,    
    num : 10,
    link : &#39;www.baidu.com&#39;
   },
   {
    href : &#39;www.taobao.com&#39;,
    title : &#39;淘宝商城&#39;,
    name : &#39;淘宝&#39;,    
    num : 2,
    link : &#39;www.taobao.com&#39;
   },
   {
    href : &#39;www.qq.com&#39;,
    title : &#39;腾讯首页&#39;,
    name : &#39;腾讯&#39;,    
    num : 3,
    link : &#39;www.qq.com&#39;
   }
  ]);