当我运行rails s时，它将在开发模式下运行我的应用程序。但是，除非删除tmp/cache/assets中的缓存文件并重新启动服务器，否则不会反映出对SCSS文件的更改。

怎么了？

资产/样式表

_masthead.scss

header.masthead {
   /* CSS Code */
}

agency.scss

// Core variables and mixins
@import "variables.scss";
@import "mixins.scss";
// Components
@import "masthead.scss";

application.scss

@import "bootstrap";
@import 'agency';
@import 'custom';

配置

environments / development.rb

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # In the development environment your application's code is reloaded on
  # every request. This slows down response time but is perfect for development
  # since you don't have to restart the web server when you make code changes.
  config.cache_classes = false

  # Do not eager load code on boot.
  config.eager_load = false

  # Show full error reports.
  config.consider_all_requests_local = true

  # Enable/disable caching. By default caching is disabled.
  # Run rails dev:cache to toggle caching.
  if Rails.root.join("tmp","caching-dev.txt").exist?
    config.action_controller.perform_caching = true

    config.cache_store = :memory_store
    config.public_file_server.headers = {
      "Cache-Control" => "public,max-age=#{2.days.to_i}"
    }
  else
    config.action_controller.perform_caching = false

    config.cache_store = :null_store
  end

  # Store uploaded files on the local file system (see config/storage.yml for options)
  config.active_storage.service = :local

  # Don't care if the mailer can't send.
  config.action_mailer.raise_delivery_errors = false

  config.action_mailer.perform_caching = false

  # Added for Devise (Per instructions)
  config.action_mailer.default_url_options = {host: "localhost",port: 3000}

  # Print deprecation notices to the Rails logger.
  config.active_support.deprecation = :log

  # Raise an error on page load if there are pending migrations.
  config.active_record.migration_error = :page_load

  # Highlight code that triggered database queries in logs.
  config.active_record.verbose_query_logs = true

  # Debug mode disables concatenation and preprocessing of assets.
  # This option may cause significant delays in view rendering with a large
  # number of complex assets.
  config.assets.debug = true

  # Suppress logger output for asset requests.
  config.assets.quiet = true

  # Raises error for missing translations
  # config.action_view.raise_on_missing_translations = true

  # Use an evented file watcher to asynchronously detect changes in source code,# routes,locales,etc. This feature depends on the listen gem.
  config.file_watcher = activeSupport::EventedFileUpdateChecker
end