用javascript做模版的话，说来也算是比较方便的，特别是对于PHP开发来说，只要扔一个json数组过来。然后剩下的就可以让javascript来完成了。
搜索一下jQuery的plugin，可以找到大约5~6个模版程序。好象用的比较多的还是jTemplate，上一次司徒正美用javascript写了一个简单的例子，这次又写了一个比较详细的，说是v2，有兴趣的朋友可以尝试一下。。
--start--司徒正美认为模版要处理复杂的玩意，所以写的功能就强大了。
本版本主要是对原模板系统进行提速，去掉消耗巨大的辅助函数。本来想用它与John Resig的 Micro-Templating比较一下速度，发现对方无法处理复杂的模板，残念。
JavaScript代码
-
- (function () {
- if(!String.prototype.trim){
- String.prototype.trim = function(str) {
- return this.replace(/^[\s\xa0]+|[\s\xa0]+$/g, '');
- }
- }
- var dom = {
- quote: function (str) {
- str = str.replace(/[\x00-\x1f\\]/g, function (chr) {
- var special = metaObject[chr];
- return special ? special : '\\u' + ('0000' + chr.charCodeAt(0).toString(16)).slice(-4)
- });
- return '"' + str.replace(/"/g, '\\"') + '"';
- }
- },
- metaObject = {
- '\b': '\\b',
- '\t': '\\t',
- '\n': '\\n',
- '\f': '\\f',
- '\r': '\\r',
- '\\': '\\\\'
- },
- parser = document.createElement("div"),
- startOfHTML = "\t__views.push(",
- endOfHTML = ");\n";
-
- //onsite，可选，Boolean，是否就地替换掉模板容器，默认true，如果为false，则返回一个文档碎片，交由用户自己插入到需要的地方
- dom.ejs = function (obj) {
- var onsite = obj.onsite === void 0 ,
- left = obj.left || "<%",
- right =obj.right || "%>",
- selector = obj.selector,
- isLeft = true,
- buff = ["var __views = [];\n"],
- fragment = document.createDocumentFragment(),
- el = document.getElementById(selector),
- ejs = dom.ejs;
- if (!el) throw "找不到目标元素";
- var str = el.text.trim();
- if(!ejs[selector]){
- while(str.length){
- var condition = isLeft ? left :right;
- var index = str.indexOf(condition);
- if(index !== -1){//取左边
- var text = str.slice(0,index);
- if(isLeft){
- buff.push(startOfHTML, dom.quote(text.trim()), endOfHTML);
- }else{
- switch (text.charAt(0)) {
- case "#"://处理注释
- break;
- case "="://处理后台返回的变量（输出到页面的);
- buff.push(startOfHTML, text.slice(1), endOfHTML)
- break;
- default:
- buff.push(text, "\n")
- };
- }
- }else{
- if(isLeft){
- buff.push(startOfHTML, dom.quote(str), endOfHTML);
- break;
- }else{
- throw "在字符串{{ "+dom.quote(str)+" }}中找不到右界定符"+right
- }
- }
- str = str.slice(index+2).trim();
- isLeft = !isLeft;
- }
- ejs[selector] = new Function("json", "with(json){"+buff.join("") + '};return __views.join("");')
- }
- parser.innerHTML = ejs[selector](obj.json || {});
- while (parser.firstChild) {
- fragment.appendChild(parser.firstChild)
- }
- return onsite ? el.parentNode.replaceChild(fragment, el) : fragment;
- };
- window.dom = dom;
-
- })();
这种使用原生代码写的例子，可以被任何代码所使用，如果你有兴趣也可以看看司徒正美的例子的。原文网址在javascript 模板系统 ejs v2，可以移步一观。
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