问题描述
我在生产中运行时遇到了一些开发中没有的问题,例如我有一个下拉菜单,在开发中运行时看起来像我想要的:只有菜单按钮可见,并且它下面的选项在悬停或聚焦之前是隐藏的。也没有要点。但是,当我在生产环境中运行时,我会在每个 <li>
上获得项目符号,而我以前隐藏的选项现在显示在菜单 <button>
下方一团糟。
HTML:
<nav class="dropdown-nav" role="navigation">
<ul class="main-menu">
<li>
<button class="btn btn--action" aria-haspopup="true"><%= t('menu') %></button>
<ul class="dropdown" aria-label="submenu">
<% if logged_in? %>
....
<% else %>
<li class="nav-item">
<%= link_to(t('signup'),signup_path) %>
</li>
<li class="nav-item">
<%= link_to(t('login'),login_path) %>
</li>
<% end %>
</ul>
</li>
</ul>
</nav>
scss:
.main-menu {
padding: 0;
list-style-type: none;
& li {
display: block;
transition-duration: 0.5s;
&:hover,&:focus-within {
cursor: pointer;
}
&:hover > ul,&:focus-within > ul,& ul:hover,& ul:focus {
visibility: visible;
opacity: 1;
display: block;
}
}
}
.dropdown {
visibility: hidden;
opacity: 0;
position: absolute;
transition: all 0.5s ease;
display: none;
padding: 0.2rem;
background-color: $off-white;
min-width: 10rem;
Box-shadow: 0px 10px 10px -5px;
z-index: 1;
overflow: auto;
margin-top: 0;
list-style-type: none;
}
.nav-item {
clear: both;
padding: 0.5rem 1rem;
&:hover,&:focus-within {
cursor: pointer;
}
}
编辑以添加我的 config/environments/production.rb 文件:
Rails.application.configure do
# Settings specified here will take precedence over those in config/application.rb.
# Code is not reloaded between requests.
config.cache_classes = false
# Eager load code on boot. This eager loads most of Rails and
# your application in memory,allowing both threaded web servers
# and those relying on copy on write to perform better.
# Rake tasks automatically ignore this option for performance.
config.eager_load = true
# Full error reports are disabled and caching is turned on.
config.consider_all_requests_local = false
config.action_controller.perform_caching = true
# Attempt to read encrypted secrets from `config/secrets.yml.enc`.
# Requires an encryption key in `ENV["RAILS_MASTER_KEY"]` or
# `config/secrets.yml.key`.
config.read_encrypted_secrets = true
# disable serving static files from the `/public` folder by default since
# Apache or Nginx already handles this.
config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
# Compress JavaScripts and CSS.
config.assets.js_compressor = :uglifier
# config.assets.css_compressor = :sass
# Do not fallback to assets pipeline if a precompiled asset is missed.
config.assets.compile = false
# `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb
# Enable serving of images,stylesheets,and JavaScripts from an asset server.
# config.action_controller.asset_host = 'http://assets.example.com'
# Specifies the header that your server uses for sending files.
# config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
# config.action_dispatch.x_sendfile_header = 'x-accel-redirect' # for Nginx
# Mount Action Cable outside main process or domain
# config.action_cable.mount_path = nil
# config.action_cable.url = 'wss://example.com/cable'
# config.action_cable.allowed_request_origins = [ 'http://example.com',/http:\/\/example.*/ ]
# Force all access to the app over SSL,use Strict-Transport-Security,and use secure cookies.
# config.force_ssl = true
# Use the lowest log level to ensure availability of diagnostic information
# when problems arise.
config.log_level = :debug
# Prepend all log lines with the following tags.
config.log_tags = [ :request_id ]
# Use a different cache store in production.
# config.cache_store = :mem_cache_store
# Use a real queuing backend for Active Job (and separate queues per environment)
# config.active_job.queue_adapter = :resque
# config.active_job.queue_name_prefix = "Appear_#{Rails.env}"
config.action_mailer.perform_caching = false
# Ignore bad email addresses and do not raise email delivery errors.
# Set this to true and configure the email server for immediate delivery to raise delivery errors.
# config.action_mailer.raise_delivery_errors = false
# Enable locale fallbacks for I18n (makes lookups for any locale fall back to
# the I18n.default_locale when a translation cannot be found).
config.i18n.fallbacks = true
# Send deprecation notices to registered listeners.
config.active_support.deprecation = :notify
# Use default logging formatter so that PID and timestamp are not suppressed.
config.log_formatter = ::Logger::Formatter.new
# Use a different logger for distributed setups.
# require 'syslog/logger'
# config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
if ENV["RAILS_LOG_TO_STDOUT"].present?
logger = ActiveSupport::Logger.new(STDOUT)
logger.formatter = config.log_formatter
config.logger = ActiveSupport::TaggedLogging.new(logger)
end
# Do not dump schema after migrations.
config.active_record.dump_schema_after_migration = false
end
解决方法
你用错了 sass ampersand。
.main-menu {
&:li {
display: block;
transition-duration: 0.5s;
...
}
}
编译为:
li.main-menu
display: block;
transition-duration: 0.5s;
...
}
虽然你想要:
.main-menu li
display: block;
transition-duration: 0.5s;
...
}
如果你去掉 & 符号,你会得到什么:
.main-menu {
padding: 0;
list-style-type: none;
li {
display: block;
transition-duration: 0.5s;
&:hover,&:focus-within {
cursor: pointer;
}
&:hover > ul,&:focus-within > ul,ul:hover,ul:focus {
visibility: visible;
opacity: 1;
display: block;
}
}
}
当您要向当前选择器添加规则时,请使用与号。使用常规嵌套为子元素定义规则。