javascript 从控制台调用咖啡脚本函数
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Calling coffeescript functions from console
提问by Lee Quarella
Playing a little with coffeescript and Rails 3.1.0.rc4. Have this code:
玩一些 Coffeescript 和 Rails 3.1.0.rc4。有这个代码：
yourMom = (location) ->
console.log location
yourMom "wuz hur"
When the page loads, this outputs "wuz hur" properly. But when I try to call
当页面加载时，这会正确输出“wuz hur”。但是当我尝试打电话时
yourMom("wuz hur")
from the chrome js console (as I do sometimes to test normal JS functions), I get a "ReferenceError: yourMom is not defined"
从 chrome js 控制台（我有时会测试普通的 JS 功能），我得到一个“ReferenceError: yourMom is not defined”
Are functions generated by coffeescript available in this way?
由咖啡脚本生成的函数是否可用这种方式？
回答by Sébastien Gruhier
an easier way to share global methods/variables is to use @ which means this.
共享全局方法/变量的一种更简单的方法是使用 @，这意味着。
@yourMom = (location) ->
console.log location
yourMom "wuz hur"
Nicer syntax and easier to read, but I don't encourage you to create global methods/variables
更好的语法和更容易阅读，但我不鼓励你创建全局方法/变量
回答by Jamie Wong
This happens because coffeescript wraps everything in a closure. The JavaScript output of that code is actually:
发生这种情况是因为 coffeescript 将所有内容都包装在一个闭包中。该代码的 JavaScript 输出实际上是：
(function() {
var yourMom;
yourMom = function(location) {
return console.log(location);
};
yourMom("wuz hur");
}).call(this);
If you want to export it to the global scope, you can either do:
如果要将其导出到全局范围，您可以执行以下任一操作：
window.yourMom = yourMom = (location) ->
console.log location
or
或者
this.yourMom = yourMom = (location) ->
console.log location
回答by liammclennan
I'm not sure about Rails but the CoffeeScript compiler has an option (--bare) to compile without the function wrapper. Fine for playing but it does pollute the global scope.
我不确定 Rails，但 CoffeeScript 编译器有一个选项 (--bare) 可以在没有函数包装器的情况下进行编译。很好玩，但它确实污染了全局范围。
回答by sajesh Nambiar
this link might solve your problem Rails - Calling CoffeeScript from JavaScriptWrap your functions in a unique namespace and then you can acess these functions from wnywhere
此链接可能会解决您的问题 Rails - Calling CoffeeScript from JavaScript将您的函数包装在一个唯一的命名空间中，然后您就可以从 wnywhere 访问这些函数
