.stylelintrc.yaml

# Keep this file in sync with internal sass/stylelint/stylelintrc.yaml file.
plugins:
  - stylelint-scss
  - stylelint-prettier
rules:
  prettier/prettier: true
  # This list is to be verified with tests in `e2e_test.js`, in order to verify that each rule is
  # functioning, and that this file does not contain typos.
  block-closing-brace-newline-after:
    - always
    - ignoreAtRules:
      - if
      - else
  block-no-empty: true
  color-hex-case: lower
  color-hex-length: short
  color-no-invalid-hex: true
  declaration-block-no-duplicate-properties: true
  declaration-block-no-redundant-longhand-properties: true
  declaration-block-no-shorthand-property-overrides: true
  declaration-block-trailing-semicolon: always
  function-calc-no-unspaced-operator: true
  function-url-no-scheme-relative: true
  function-url-quotes: never
  # Need to check if units are required for some flex properties in some browsers.
  # length-zero-no-unit
  no-duplicate-at-import-rules: true
  no-eol-whitespace: true
  no-extra-semicolons: true
  # In MDC, @keyframe's are defined in a separate file.
  # no-unknown-animations: true
  # Requires known-css-parser, not yet imported into third_party.
  # property-no-unknown: true
  rule-empty-line-before:
    - always
    - ignore:
      - after-comment
      - first-nested
      - inside-block
  selector-pseudo-class-no-unknown: true
  selector-pseudo-element-no-unknown:
    - true
    - ignorePseudoElements:
        ng-deep
  scss/at-rule-no-unknown:
    - true
    - ignoreAtRules:
      - provide
      - require
  # No config allows this:
  #
  # ```scss
  # $long-varaible-name:
  #     (long, list, of, strings, that, is, too, wide, for, good, formatting);
  # ```
  #
  # Possibly solved with request at https://github.com/kristerkari/stylelint-scss/issues/172.
  # scss/dollar-variable-colon-space-after: always
  scss/dollar-variable-colon-space-before: never
  scss/operator-no-unspaced: true
  shorthand-property-no-redundant-values: true
  # TODO: Enable this when not conflicting with other sass file changes.
  # string-quotes: single
  unit-case: lower
  unit-no-unknown:
    - true
    - ignoreUnits:
      - /^[-+][\d$(]/
  value-keyword-case: lower