在：prod配置文件下使用NPM模块编译cljs prj时，“ a未定义” [英] 'a is undefined' when compiling a cljs prj with an NPM module under :prod profile

问题描述

我遵循以下方法： http：//blob.tomerweller。 com / reagent-import-react-components-from-npm ，效果很好。我什至设法在重新构建此示例应用程序的顶部使用自己的NPM模块之一： https://github.com/Day8/re-frame/tree/master/examples/simple/

I followed this howto: http://blob.tomerweller.com/reagent-import-react-components-from-npm and it worked great. I even managed to use one of my own NPM module on top of this example app of re-frame: https://github.com/Day8/re-frame/tree/master/examples/simple/

生成的应用程序具有以下内容：

Starting the resulting app with:

lein clean && lein figwheel

一切正常，但是当我这样做时：

everything works ok, but when I do:

lein do clean, with-profile prod compile

我收到 TypeError：a未定义。想解决这个问题吗？

I get a TypeError: a is undefined. Any idea to fix this?

让我为您提供代码：错误的提交是此处，
，而同时：dev 和：prod 配置文件可以正常运行在之前的提交中。

Let me provide you with the code: the bad commit is here, while both :dev and :prod profiles work OK at this just previous commit.

更新：我设法修复了编译后的版本（请参见提交）：

Update: I managed to fix the compiled version like this (see the commit):

  return d.c?d.c(c,v,w):d.call(null,c,v,w)}}(G,r,b,c,d,e)),I=dw(G);rf.b?: […]
  };w.b=v;w.c=f;return w}()}(c,d,e,f))};hf.b(ow,ik);hf.b(ow,bp);hf.b(ow,To); […]
  function nx(a){var b=window.deps["react-mathjax"],
-    c=window.deps.clubexpr.kf;
+    c=window.deps.clubexpr.renderLispAsLaTeX;
  return new U(null,3,5,V,[Vj,b.Context,new U(null,4,null)}
  function Wv(){return function(a){return function(){return new U(null,6,5,V,[…]

我是编译错误或错误。

更新2 ：如果我设置了：optimizations 到：simple （以前是：advanced ）。请参见有关此选项的cljs编译器文档。

Update 2: my code compiles OK if I set :optimizations to :simple (was :advanced). See the cljs compiler doc about this option.

谢谢。

推荐答案

失败的代码是此处。

您似乎需要提供 externs for c lubexpr，以便Closure编译器知道不将 renderLispAsLatex 重写为 kf 。在：simple下进行编译时，Closure Compiler不会重写函数名称，因此不会出现此问题。

It looks like you might need to provide externs for clubexpr, so that the Closure Compiler knows not to rewrite renderLispAsLatex as kf. When compiling under :simple, the Closure Compiler doesn't rewrite function names, so this problem wouldn't show up.

作为补充，您可能不应该这样做使用 aget 从窗口获取对象， aget 仅用于数组访问。要获取对象，您应该使用 goog.object / get 。请参阅已检查阵列访问上的这篇文章，以了解更多信息

As a side note, you probably shouldn't use aget to get objects from the window, aget is designed for array access only. To get objects, you should use goog.object/get. See this post on Checked Array Access for more info on this.

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