Detailed explanation of EJS template engine examples
前面的话
nodejs的模板引擎有很多, EJS是比较简单和容易上手的。本文将详细介绍EJS
概述
EJS是一个简单高效的模板语言,通过数据和模板,可以生成HTML标记文本。可以说EJS是一个JavaScript库,EJS可以同时运行在客户端和服务器端,客户端安装直接引入文件即可,服务器端用npm包安装
【安装】
ejs可以配合express框架使用,或直接在node中/浏览器中使用
$ npm install ejs
【特点】
1、快速编译和渲染
2、简单的模板标签
3、自定义标记分隔符
4、支持文本包含
5、支持浏览器端和服务器端
6、模板静态缓存
7、支持express视图系统
用法
nbsp;html> <meta> <title>Document</title> <div></div> <script></script> <script>var html = ejs.render('<%=123 %>',''); document.getElementById('div1').innerHTML = html;</script>

方法
【ejs.compile(str,[option])】
编译字符串得到模板函数,参数如下
str:需要解析的字符串模板 option:配置选项
var template = ejs.compile('');var result = template(); console.log(result);//123
【ejs.render(str,data,[option])】
直接渲染字符串并生成html,参数如下
str:需要解析的字符串模板 data:数据 option:配置选项
var result = ejs.render(''); console.log(result);//123
两个函数包括的配置选项参数options如下:
cache 缓存编译后的函数(ejs.compile(..) ,需要 filename参数作为缓存的key filename 用于缓存的key,和include context 函数的执行上下文 compileDebug 输出compile的信息来跟踪调试 client 返回编译后的函数 delimiter 指这里的%debug 输出ejs.compile()得到函数的函数体 strict ejs.compile()返回的函数是否执行在严格模式 _with 是否使用 with(){..} 来访问本地变量 localsName 保存本地变量的对象名,默认为locals rmWhitespace 移除多余空格
常用标签
【js】
所有使用 括起来的内容都会被编译成 Javascript,可以在模版文件中像写js一样Coding
//test.ejs //test.jsvar ejs = require('ejs');var fs = require('fs');var data = fs.readFileSync('test.ejs');var result = ejs.render(data.toString()); console.log(result);//123
或者,像下面这样写
var ejs = require('ejs');var result = ejs.render(''); console.log(result);//123
【变量】
用输出变量,变量若包含 '' '&'等字符会被转义
var ejs = require('ejs');var result = ejs.render('',{a:'<div>123</div>'}); console.log(result);//<div>123</div>
如果不希望变量值的内容被转义,那就这么用输出变量
var ejs = require('ejs');var result = ejs.render('',{a:'<div>123</div>'}); console.log(result);//<div>123</div>
【注释】
用来注释,不执行不输出
【include】
include 可以引用绝对路径或相对路径的模板文件
//test.ejs //test.jsvar ejs = require('ejs');var result = ejs.render('');//throw new Error('`include` use relative path requires the \'filename\' option.');console.log(result);
由上面的提示可知,使用相对路径时,必须设置'filename'选项
//test.ejs //test.jsvar ejs = require('ejs');var result = ejs.render('',{filename:'test.ejs'}); console.log(result);//123
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