javascript - gem Assets 内的配置不起作用

Question

我创建了一个名为 Supportator 的 gem当浏览器版本不受支持时，会发出警告模式。目前它接受配置哈希，您可以在其中传递每个浏览器不支持的最新版本。

代码

这是我的应用程序内的初始化程序config/initializers/supportator.rb

   Supportator.configure({:chrome => 30, :ie => 11})

这是gem的配置文件lib/supportator.rb:

   require "supportator/version"
   require "engine"

   module Supportator

     @config = {
                 :chrome => 14,
                 :safari => 5,
                 :firefox => 3,
                 :ie => 9,
                 :opera => 12
     }

     @valid_config_keys = @config.keys

     def self.configure(opts = {})
       opts.each {|k,v| @config[k.to_sym] = v if @valid_config_keys.include? k.to_sym}
     end

     def self.config
       @config
     end

   end

这是触发 gem 模式的 js.erb 文件的一部分 lib/assets/javascripts/supportator.js.erb:

    ...

    if (browserName == "Chrome" && majorVersion >= <%= Supportator.config[:chrome] %>)
        supported = true;
    else if (browserName == "Safari" && majorVersion >= <%= Supportator.config[:safari] %>)
        supported = true;
    else if (browserName == "Firefox" && majorVersion >= <%= Supportator.config[:firefox] %>)
        supported = true;
    else if (browserName == "Microsoft Internet Explorer" && majorVersion >= <%= Supportator.config[:ie] %>)
        supported = true;
    else if (browserName == "Opera" && majorVersion >= <%= Supportator.config[:opera] %>)
        supported = true;
    else
        supported = false;

    ....

问题

当我看到预编译后的代码时，结果是:

    ...

    if (browserName == "Chrome" && majorVersion >= 14)
        supported = true;
    else if (browserName == "Safari" && majorVersion >= 5)
        supported = true;
    else if (browserName == "Firefox" && majorVersion >= 3)
        supported = true;
    else if (browserName == "Microsoft Internet Explorer" && majorVersion >= 9)
        supported = true;
    else if (browserName == "Opera" && majorVersion >= 12)
        supported = true;
    else
        supported = false;

    ....

但是当我输入控制台 Supportator.config[:ie] 时，结果是 12。

显然，在 js.erb 的预编译中，配置被忽略。有人知道为什么会发生这种情况吗？

Answer 1

我知道这可能没有帮助，但我无法重现您的错误。当我RAILS_ENV=development bundle exec rake assets:precompile然后rails s

时，你的gem按预期运行