koahub-handlebars

koahub-handlebars

koahub handlebars templates

Installation

$ npm install koahub-handlebars

Use with koa

 var koa = require('koa');
 var hbs = require('koahub-handlebars');
 
 var app = koa();
 
 // koahub-handlebars is middleware. `use` it before you want to render a view 
 app.use(hbs.middleware({
   viewPath: __dirname + '/views'
 }));
 
 // Render is attached to the koa context. Call `this.render` in your middleware 
 // to attach rendered html to the koa response body. 
 app.use(function *() {
   yield this.render('index', {title: 'koahub-handlebars'});
 })
 
 app.listen(3000);
 

Registering Helpers

Helpers are registered using the #registerHelper method. Here is an example using the default instance (helper stolen from official Handlebars docs:

hbs = require('koahub-handlebars');
 
hbs.registerHelper('link', function(text, url) {
  text = hbs.Utils.escapeExpression(text);
  url  = hbs.Utils.escapeExpression(url);
 
  var result = '<a href="' + url + '">' + text + '</a>';
 
  return new hbs.SafeString(result);
});

Your helper is then accessible in all views by using, {{link "Google" "http://google.com"}}

The registerHelper, Utils, and SafeString methods all proxy to an internal Handlebars instance. If passing an alternative instance of Handlebars to the middleware configurator, make sure to do so before registering helpers via the koahub-handlebars proxy of the above functions, or just register your helpers directly via your Handlebars instance.

You can also access the current Koa context in your helper. If you want to have a helper that outputs the current URL, you could write a helper like the following and call it in any template as {{requestURL}}.

hbs.registerHelper('requestURL', function() {
  var url = hbs.templateOptions.data.koa.request.url;
  return url;
});

Registering Partials

The simple way to register partials is to stick them all in a directory, and pass the partialsPath option when generating the middleware. Say your views are in ./views, and your partials are in ./views/partials. Configuring the middleware via

app.use(hbs.middleware({
  viewPath: __dirname + '/views',
  partialsPath: __dirname + '/views/partials'
}));

will cause them to be automatically registered. Alternatively, you may register partials one at a time by calling hbs.registerPartial which proxies to the cached handlebars #registerPartial method.

Layouts

Passing defaultLayout with the a layout name will cause all templates to be inserted into the {{{body}}} expression of the layout. This might look like the following.

<!DOCTYPE html>
<html>
<head>
  <title>{{title}}</title>
</head>
<body>
  {{{body}}}
</body>
</html>

In addition to, or alternatively, you may specify a layout to render a template into. Simply specify {{!< layoutName }} somewhere in your template. koahub-handlebars will load your layout from layoutsPath if defined, or from viewPath otherwise.

At this time, only a single content block ({{{body}}}) is supported.

Options

The plan for koahub-handlebars is to offer identical functionality as koa-hbs (eventaully). These options are supported now.

  • viewPath: [required] Full path from which to load templates (Array|String)
  • handlebars: Pass your own instance of handlebars
  • templateOptions: Hash of handlebars options to pass to template()
  • extname: Alter the default template extension (default: '.html')
  • partialsPath: Full path to partials directory (Array|String)
  • defaultLayout: Name of the default layout
  • layoutsPath: Full path to layouts directory (String)
  • disableCache: Disable template caching (default: '.true')

Locals

Application local variables ([this.state](https://github.com/koajs/koa/blob/master/docs/api/context.md#ctxstate)) are provided to all templates rendered within the application.

app.use(function *(next) {
  this.state.title = 'My App';
  this.state.email = 'me@myapp.com';
  yield next;
});

The state object is a JavaScript Object. The properties added to it will be exposed as local variables within your views.

<title>{{title}}</title>
 
<p>Contact : {{email}}</p>

Thanks

koa-hbs

Differents

  1. Configuration file incremental changes
  2. Modify some of the features and the default configuration
  3. ...

官网：http://js.koahub.com

基于 Koa平台Node.js开发的KoaHub.js的模板引擎代码的更多相关文章

  1. 基于 Koa平台Node.js开发的KoaHub.js的控制器，模型，帮助方法自动加载

    koahub-loader koahub-loader是基于 Koa平台Node.js开发的KoaHub.js的koahub-loader控制器,模型,帮助方法自动加载 koahub loader I ...

  2. 基于 Koa平台Node.js开发的KoaHub.js连接打印机的代码

    最近好多小伙伴都在做微信商城的项目,那就给大家分享一个基于 Koa.js 平台的 Node.js web 开发的框架连接微信易联云打印机接口的代码,供大家学习.koahub-yilianyun 微信易 ...

  3. 基于 Koa平台Node.js开发的KoaHub.js获取/设置会话功能代码

    koa-session2 Middleware for Koa2 to get/set session use with custom stores such as Redis or mongodb ...

  4. 基于 Koa平台Node.js开发的KoaHub.js的静态服务器重写和索引代码

    koa-static-server Static file serving middleware for koa with directory, rewrite and index support k ...

  5. 基于 Koa平台Node.js开发的KoaHub.js的输出json到页面代码

    koahub-body-res koahub body res Format koa's respond json. Installation $ npm install koahub-body-re ...

  6. 基于 Koa平台Node.js开发的KoaHub.js的跳过组件代码

    koahub-skip koahub skip middleware koahub skip Conditionally skip a middleware when a condition is m ...

  7. 基于webpack的前端工程化开发解决方案探索（二）：代码分割与图片加载

    今天我们继续来进行webpack工程化开发的探索! 首先来验证上一篇文章   基于webpack的前端工程化开发解决方案探索(一):动态生成HTML  中的遗留问题:webpack将如何处理按需加载的 ...

  8. node(基础)_node.js中的http服务以及模板引擎的渲染

    一.前言 本节的内容主要涉及: 1.node.js中http服务 2.node.js中fs服务 3.node.js中模板引擎的渲染 4.利用上面几点模拟apache服务器 二.知识 1.node.js ...

  9. 搭建基于MinGW平台的《OpenGL蓝皮书(OpenGL SuperBibe 5th)》示例代码编译环境

    副标题:搭建基于MinGW平台的<OpenGL超级宝典>(OpenGL蓝皮书第5版)GLTools 编译环境.示例代码:Triangle.cpp @ SB5.zip 以下内容以及方法均参考 ...

随机推荐

  1. 设置与菜单项关联的Activity

    有些时候,应用程序需要单击某个菜单项时启动其他Activity(包括其他Service).对于这种需求,Android设置不需要开发者编写任何事件处理代码,只要调用MenuItem的setIntent ...

  2. cygwin下配置alias

    主要是cygwin下的盘符映射关系容易忘,直接用mount命令: 所以,找到E:\cygwin64\home\Administrator下面的.bashrc,添加alias.如下:

  3. multipathd dead but pid file exists

    构建RAC环境时出现的错误 百度半天未找到解决方案,Google了一下,终于找到可行方案 Solution:- yum update device-mapper glibc -y [root@HE2 ...

  4. 集群环境下JSP中获取客户端IP地址的方法

    String ip = request.getHeader("X-Forwarded-For");if (ip == null || ip.length() == 0 || &qu ...

  5. Flux --> Redux --> Redux React 入门

    本文的目的很简单,介绍Redux相关概念用法 及其在React项目中的基本使用 假设你会一些ES6.会一些React.有看过Redux相关的文章,这篇入门小文应该能帮助你理一下相关的知识 一般来说,推 ...

  6. DDD创始人Eric Vans:要实现DDD原始意图，必须CQRS+Event Sourcing架构

    http://www.infoq.com/interviews/Technology-Influences-DDD# 要实现DDD(domain drive  design 领域驱动设计)原始意图,必 ...

  7. Wireshark网络抓包(一)——数据包、着色规则和提示

    一.数据包详细信息 Packet Details面板内容如下,主要用于分析封包的详细信息. 帧:物理层.链路层 包:网络层 段:传输层.应用层 1)Frame 物理层数据帧概况 2)Ethernet ...

  8. linux 中c/c++实现终端命令行命令

    在终端中可以从用下面命令获得帮助: man system 在c/c++代码中实现和在终端中输入的命令行一样的效果,以命令(audacious -p &)为例,该代码实现用audacious在后 ...

  9. [css]《css揭秘》学习（四）-一个元素实现内圆角边框

    如图所示的圆角边框有两个元素很好实现,用一个元素也可以实现. <html> <head> <meta charset="utf-8"> < ...

  10. 性能秒杀log4net的NLogger日志组件(附测试代码与NLogger源码)

    NLogger特性: 一:不依赖于第三方插件和支持.net2.0 二:支持多线程高并发 三:读写双缓冲对列 四:自定义日志缓冲大小 五:支持即时触发刷盘机制 六:先按日期再按文件大小滚动Rolling ...