全局类，Meteor> 0.6.0和CoffeeScript [英] Global classes with Meteor >0.6.0 and CoffeeScript

问题描述

自从发布Meteor 0.6.0和添加文件级JavaScript变量范围，我遇到了一个使用CoffeeScript类的问题，每个类都在自己的相应文件中定义。

foo.coffee：

  class Foo 
 ... 
  

subfoo.coffee：

  extends Foo 
 ... 
  

像预期的那样， .0，我得到以下错误：

ReferenceError：Foo未定义

这里是我的问题：如何使用CoffeeScript和Meteor> 0.6.0处理跨文件的类定义？理想情况是：有没有方便的方法修改太多的类定义方式，以确保这些定义（和我的应用程序的核心部分）不依赖于Meteor？

解决方案

正如 docs 的CoffeeScript部分所述， a>：

全局变量可以在CoffeeScript中使用（或
CoffeeScript的@简写）来设置

$事实证明，CoffeeScript类可以定义为：

 <$> 
 
 

< c $ c> class @Foo

其编译为：

  this.Foo =（function（）{
 function Foo（）{} 
 return Foo; 
}） 
  

假设 foo.coffee subfoo.coffee 你可以这样做：

  class @Subfoo extends Foo 
  

假设 Subfoo 被分配到全局范围。还值得一提的是，您需要以类似的方式公开您的集合。例如：

  @Players = new Meteor.Collection玩家
  pre> 
Since the release of Meteor 0.6.0 and the addition of file-level JavaScript variable scoping, I'm facing an issue using CoffeeScript classes, each of them being defined in its own respective file.

foo.coffee:
class Foo
  ...
subfoo.coffee:
class Subfoo extends Foo
  ...
As expected, and because of the changes introduced in Meteor 0.6.0, I'm getting the following error:

  
ReferenceError: Foo is not defined
Here's my question: how should one handle class definitions across files with CoffeeScript and Meteor >0.6.0? Ideally: is there a convenient way not to modify too much the way classes are defined in order to make sure these definitions (and core parts of my application) are not Meteor-dependent?
解决方案
As noted in the CoffeeScript section of the docs:

  
Global variables can be set in CoffeeScript by using this (or
  CoffeeScript's @ shorthand)
As it turns out, CoffeeScript classes can be defined like:
class @Foo
which compiles to:
this.Foo = (function() {
  function Foo() {}
  return Foo;
})();
Assuming that foo.coffee is loaded before subfoo.coffee you can then do:
class @Subfoo extends Foo
Assuming, of course, that Subfoo needs be be assigned to the global scope. It's also worth mentioning that you'll need to expose your collections in a similar way. For example:
@Players = new Meteor.Collection 'players'


                        
这篇关于全局类，Meteor> 0.6.0和CoffeeScript的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！