A brief discussion on custom templates in javascript_javascript skills

/**
 * Created by Administrator on 15-1-19.
 */
function functionUtil() {
}
functionUtil = {
  //某个DOM节点是否有某个属性
  hasAttr: function (el, name) {
    var attr = el.getAttributeNode && el.getAttributeNode(name);
    return attr ? attr.specified : false
  },
  //根据class获取元素
  getByClass: function (sClass, oParent) {
    oParent = oParent || document;
    if (!oParent.getElementsByClassName) {
      return oParent.getElementsByClassName(sClass);
    }
    var arr = [];
    var aEle = oParent.getElementsByTagName('*');
    var reg = new RegExp('(^|\\s)' + sClass + '(\\s|$)');
    //var reg = new RegExp('(^|[\\x20\\t\\r\\n\\f])' + sClass + '([\\x20\\t\\r\\n\\f]|$)');
    for (var i = 0; i < aEle.length; i++) {
      if (reg.test(aEle[i].className)) {
        arr.push(aEle[i]);
      }
    }
    return arr;
  },
  //动态添加样式表
  addSheetFile: function (path) {
    var fileref = document.createElement("link")
    fileref.rel = "stylesheet";
    fileref.type = "text/css";
    fileref.href = path;
    fileref.media = "screen";
    var headobj = document.getElementsByTagName('head')[0];
    headobj.appendChild(fileref);
  },
  //根据指定格式如 ${name} 绑定json数据
  LoadJsonData: function (sParent, oJson) {
    var oParent = document.getElementById(sParent);
    if (oJson instanceof Array) {
      var str = oParent.innerHTML;
      for (var i = 0; i < oJson.length - 1; i++) {
        oParent.innerHTML += str;
      }
      for (var d in oJson) {
        oParent.children[d].innerHTML = oParent.children[d].innerHTML.replace(/\$\{(\w+)\}/g, function (str, $1) {
          return oJson[d][$1] &#63; oJson[d][$1] : '';
        });
      }
    } else {
      oParent.innerHTML = oParent.innerHTML.replace(/\$\{(\w+)\}/g, function (str, $1) {
        return oJson[$1] &#63; oJson[$1] : '';
      });
    }
  },
  //根据指定格式如<%……%>绑定json数据
  TemplateEngine: function (html, options) {
    html = html.replace(/(>)|(<)/g, function (str, $1, $2) {
      switch (str) {
        case $1:
          return '>';
        case $2:
          return '<';
      }
    });
    var re = /<%([^%>]+)&#63;%>/g, reExp = /(^( )&#63;(if|for|else|switch|case|break|{|}))(.*)&#63;/g, code = 'var r=[];\n', cursor = 0;
    var add = function (line, js) {
      js &#63; (code += line.match(reExp) &#63; line + '\n' : 'r.push(' + line + ');\n') :
        (code += line != '' &#63; 'r.push("' + line.replace(/"/g, '\\"') + '");\n' : '');
      return add;
    }
    while (match = re.exec(html)) {
      add(html.slice(cursor, match.index))(match[1], true);
      cursor = match.index + match[0].length;
    }
    add(html.substr(cursor, html.length - cursor));
    code += 'return r.join("");';
    return new Function(code.replace(/[\r\t\n]/g, '')).apply(options);
  }
}

<div id="data">
  <div class="item">
    姓名：${name}<br/>
    年龄：${age}<br/>
    职业：${job}<br/><br/>
  </div>
</div>

var data = [
      {
          name: '徐磊',
          age: 24,
          job: 'IT'
        },
        {
          name: '李磊',
          age: 23,
          job: '翻译'
        }
  ];


functionUtil.LoadJsonData('data', data);

<div id="test3">
  <%if(this.isShow){
   for(var i in this.data){%>
    <p href="#">姓名：<%this.data[i].name%></p>

    <p href="#">年龄：<%this.data[i].age%></p>

    <p href="#">工作：<%this.data[i].job%></p>
    <br/>
  <%}}%>
</div>

var person = {
        data: [
          {
            name: '徐磊',
            age: 24,
            job: 'IT'
          },
          {
            name: '李磊',
            age: 23,
            job: '翻译'
          }
        ],
        isShow: true
      }


  document.getElementById("test3").innerHTML = functionUtil.TemplateEngine(document.getElementById("test3").innerHTML, person);