javascript——浅谈javascript模版（自定义）

/**
 * 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] ? oJson[d][$1] : '';
                });
            }

        } else {
            oParent.innerHTML = oParent.innerHTML.replace(/${(w+)}/g, function (str, $1) {
                return oJson[$1] ? oJson[$1] : '';
            });
        }
    },
    //根据指定格式如<%……%>绑定json数据
    TemplateEngine: function (html, options) {
        html = html.replace(/(&gt;)|(&lt;)/g, function (str, $1, $2) {
            switch (str) {
                case $1:
                    return '>';
                case $2:
                    return '<';
            }
        });
        var re = /<%([^%>]+)?%>/g, reExp = /(^( )?(if|for|else|switch|case|break|{|}))(.*)?/g, code = 'var r=[];
', cursor = 0;
        var add = function (line, js) {
            js ? (code += line.match(reExp) ? line + '
' : 'r.push(' + line + ');
') :
                (code += line != '' ? 'r.push("' + line.replace(/"/g, '\"') + '");
' : '');
            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(/[
	
]/g, '')).apply(options);
    }
}

1、第一种方式:${key}

functionUtil.LoadJsonData(element, data);

”html“代码：

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

javascript代码:

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


functionUtil.LoadJsonData('data', data);    

执行结果:

2、第二种方式<% 代码 %>

functionUtil.TemplateEngine(string,Object);

"html"代码：

<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>

javascript代码：

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);

结果：