.stylelintrc.json

{
    "plugins": ["stylelint-scss"],
    "files": ["**/*.scss"],
    "customSyntax": "postcss-scss",
    "ignoreFiles": ["projects/igniteui-angular/src/lib/core/styles/**/*.md", "projects/igniteui-angular/src/lib/core/styles/spec/*.ts"],
    "rules": {
        "at-rule-disallowed-list": ["debug", {
            "severity": "warning"
        }],
        "block-closing-brace-empty-line-before": "never",
        "block-closing-brace-newline-after": "always-single-line",
        "block-no-empty": true,
        "color-hex-case": "lower",
        "color-hex-length": "short",
        "color-no-invalid-hex": true,
        "comment-no-empty": true,
        "declaration-block-no-duplicate-properties": true,
        "declaration-block-no-shorthand-property-overrides": true,
        "declaration-block-single-line-max-declarations": 1,
        "declaration-colon-space-after": "always",
        "font-family-no-duplicate-names": true,
        "font-family-no-missing-generic-family-keyword": true,
        "font-weight-notation": "numeric",
        "function-calc-no-unspaced-operator": true,
        "function-comma-space-after": "always-single-line",
        "indentation": 4,
        "length-zero-no-unit": true,
        "max-nesting-depth": [3, {
            "severity": "warning"
        }],
        "no-duplicate-at-import-rules": true,
        "no-duplicate-selectors": true,
        "no-extra-semicolons": true,
        "no-invalid-double-slash-comments": true,
        "no-missing-end-of-source-newline": true,
        "number-leading-zero": "never",
        "number-no-trailing-zeros": true,
        "property-no-unknown": true,
        "rule-empty-line-before": ["always-multi-line", {
            "except": ["first-nested"],
            "ignore": ["after-comment"]
        }],
        "selector-attribute-quotes": "always",
        "selector-attribute-operator-space-after": "never",
        "selector-attribute-operator-space-before": "never",
        "selector-combinator-space-after": "always",
        "selector-combinator-space-before": "always",
        "selector-descendant-combinator-no-non-space": true,
        "selector-list-comma-newline-after": "always",
        "selector-pseudo-class-case": "lower",
        "selector-pseudo-class-no-unknown": true,
        "selector-pseudo-class-parentheses-space-inside": "never",
        "selector-pseudo-element-case": "lower",
        "selector-pseudo-element-colon-notation": "double",
        "selector-pseudo-element-no-unknown": true,
        "selector-type-case": "lower",
        "selector-type-no-unknown": [true, {
            "ignore": ["custom-elements"]
        }],
        "shorthand-property-no-redundant-values": true,
        "string-quotes": "single",
        "unit-case": "lower",
        "value-keyword-case": ["lower", {
            "camelCaseSvgKeywords": true
        }],
        "value-list-comma-space-after": "always-single-line",
        "value-no-vendor-prefix": true,
        "scss/at-else-closing-brace-newline-after": "always-last-in-chain",
        "scss/at-else-closing-brace-space-after": "always-intermediate",
        "scss/at-else-empty-line-before": "never",
        "scss/at-extend-no-missing-placeholder": true,
        "scss/at-if-closing-brace-newline-after": "always-last-in-chain",
        "scss/at-if-closing-brace-space-after": "always-intermediate",
        "scss/at-import-no-partial-leading-underscore": true,
        "scss/at-mixin-argumentless-call-parentheses": "always",
        "scss/at-mixin-parentheses-space-before": "never",
        "scss/at-rule-no-unknown": true,
        "scss/double-slash-comment-inline": "never",
        "scss/dollar-variable-colon-newline-after": null,
        "scss/dollar-variable-colon-space-after": "always",
        "scss/selector-no-redundant-nesting-selector": true
    }
}