标签：javascript ruby-on-rails-4 coffeescript pre-compilation
我正在使用coffeescript ruby-on-rails.如果咖啡代码中存在语法问题,将coffeescript编译为纯JS会导致错误.在我运行应用程序时的浏览器上,我收到此错误：ExecJS::RuntimeError
有什么办法可以找出导致编译错误的原因,当它试图将咖啡代码编译成JS时？
附件是error
的屏幕截图
以下是服务器日志中的条目,它无法指示实际导致语法错误的文件：
ActionView::Template::Error (SyntaxError: [stdin]:25:10: unexpected :):
4: <meta name="viewport" content="width=device-width, initial-scale=1.0">
5: <title><%= content_for?(:title) ? yield(:title) : "Inmonarch Website" %></title>
6: <meta name="description" content="<%= content_for?(:description) ? yield(:description) : "Inmonarch Website" %>">
7: <%= stylesheet_link_tag 'application', media: 'all' %>
8: <%= javascript_include_tag 'application' %>
9: <%= csrf_meta_tags %>
10: </head>
app/views/layouts/dashboard.html.erb:7:in `_app_views_layouts_dashboard_html_erb__3120053487817944018_56303120'
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/_source.erb (7.4ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (3.0ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.6ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/template_error.html.erb within rescues/layout (25.5ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/web-console-2.3.0/lib/web_console/templates/_markup.html.erb (0.3ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/web-console-2.3.0/lib/web_console/templates/_inner_console_markup.html.erb within layouts/inlined_string (0.3ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/web-console-2.3.0/lib/web_console/templates/_prompt_box_markup.html.erb within layouts/inlined_string (0.3ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/web-console-2.3.0/lib/web_console/templates/style.css.erb within layouts/inlined_string (0.3ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/web-console-2.3.0/lib/web_console/templates/console.js.erb within layouts/javascript (296.8ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/web-console-2.3.0/lib/web_console/templates/main.js.erb within layouts/javascript (0.2ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/web-console-2.3.0/lib/web_console/templates/error_page.js.erb within layouts/javascript (0.3ms)
Rendered /home/vipin8169/.rvm/gems/ruby-2.2.3@rails426/gems/web-console-2.3.0/lib/web_console/templates/index.html.erb (313.8ms)
PS： – 我知道语法错误是什么,我故意做出语法错误,以确定我是否能够在日志的帮助下跟踪错误,我不能.
解决方法:
一种解决方法是在rails之外编译.coffee文件以获得一个不错的错误消息：
如果你还没有：
npm i coffee-script -g
然后在.coffee文件的父目录中：
coffee --output deleteme --compile .
完成后,删除它创建的deleteme文件夹(仅在修复所有错误时才创建).这应该找到你的语法错误,并告诉你它到底在哪里.
标签：javascript,ruby-on-rails-4,coffeescript,pre-compilation 来源： https://codeday.me/bug/20191006/1860864.html
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