development.services.yml

Drupal 8 dev services

# Local development services.
#
# To activate this feature, follow the instructions at the top of the
# 'example.settings.local.php' file, which sits next to this file.
parameters:
  http.response.debug_cacheability_headers: true
  twig.config:
    # Twig debugging:
    #
    # When debugging is enabled:
    # - The markup of each Twig template is surrounded by HTML comments that
    #   contain theming information, such as template file name suggestions.
    # - Note that this debugging markup will cause automated tests that directly
    #   check rendered HTML to fail. When running automated tests, 'debug'
    #   should be set to FALSE.
    # - The dump() function can be used in Twig templates to output information
    #   about template variables.
    # - Twig templates are automatically recompiled whenever the source code
    #   changes (see auto_reload below).
    #
    # For more information about debugging Twig templates, see
    # https://www.drupal.org/node/1906392.
    #
    # Not recommended in production environments
    # @default false
    debug: true
    # Twig auto-reload:
    #
    # Automatically recompile Twig templates whenever the source code changes.
    # If you don't provide a value for auto_reload, it will be determined
    # based on the value of debug.
    #
    # Not recommended in production environments
    # @default null
    auto_reload: null
    # Twig cache:
    #
    # By default, Twig templates will be compiled and stored in the filesystem
    # to increase performance. Disabling the Twig cache will recompile the
    # templates from source each time they are used. In most cases the
    # auto_reload setting above should be enabled rather than disabling the
    # Twig cache.
    #
    # Not recommended in production environments
    # @default true
    cache: false
  renderer.config:
    # Renderer required cache contexts:
    #
    # The Renderer will automatically associate these cache contexts with every
    # render array, hence varying every render array by these cache contexts.
    #
    # @default ['languages:language_interface', 'theme', 'user.permissions']
    required_cache_contexts: ['languages:language_interface', 'theme', 'user.permissions']
    # Renderer automatic placeholdering conditions:
    #
    # Drupal allows portions of the page to be automatically deferred when
    # rendering to improve cache performance. That is especially helpful for
    # cache contexts that vary widely, such as the active user. On some sites
    # those may be different, however, such as sites with only a handful of
    # users. If you know what the high-cardinality cache contexts are for your
    # site, specify those here. If you're not sure, the defaults are fairly safe
    # in general.
    #
    # For more information about rendering optimizations see
    # https://www.drupal.org/developing/api/8/render/arrays/cacheability#optimizing
    auto_placeholder_conditions:
      # Max-age at or below which caching is not considered worthwhile.
      #
      # Disable by setting to -1.
      #
      # @default 0
      max-age: 0
      # Cache contexts with a high cardinality.
      #
      # Disable by setting to [].
      #
      # @default ['session', 'user']
      contexts: ['session', 'user']
      # Tags with a high invalidation frequency.
      #
      # Disable by setting to [].
      #
      # @default []
      tags: []
services:
  cache.backend.null:
    class: Drupal\Core\Cache\NullBackendFactory