.stylelintrc.json

{
    "extends": "stylelint-config-standard",
    "plugins": [
        "stylelint-no-unsupported-browser-features"
    ],
    "ignoreFiles": ["css/chat-bundle.css"],
    "rules": {
        "declaration-no-important": null,
        "rule-empty-line-before": null,
        "no-descending-specificity": null,
        "color-hex-length": null,
        "custom-property-empty-line-before": null,
        "declaration-empty-line-before": null,
        "selector-class-pattern": null,
        "no-irregular-whitespace": true,
        "property-disallowed-list": [ "text-transform" ],
        "selector-not-notation": "simple",
        "media-feature-range-notation": "prefix",
        "length-zero-no-unit": [
            true,
            {
                "ignore": [ "custom-properties" ]
            }
        ],
        "block-no-empty": [
            true,
            {
                "ignore": [
                    "comments"
                ]
            }
        ],

        "plugin/no-unsupported-browser-features": [
            true,
            {
                "ignore": [
                    "css-appearance",
                    "css-gradients",
                    "css-masks",
                    "multicolumn",
                    "css-sticky",
                    "intrinsic-width"
                ],
                "severity": "error"
            }
        ],
        "alpha-value-notation": [
            "number",
            {
                "severity": "error"
            }
        ],
        "comment-empty-line-before": [
            "always",
            {
                "severity": "warning"
            }
        ],
        "comment-whitespace-inside": [
            "always",
            {
                "severity": "warning"
            }
        ],
        "no-duplicate-selectors": [
            true,
            {
                "severity": "warning"
            }
        ],
        "color-function-notation": [
            "legacy",
            {
                "severity": "warning"
            }
        ],
        "value-no-vendor-prefix": [
            true,
            {
                "ignoreValues": [
                    "sticky",
                    "max-content",
                    "box",
                    "fill-available"
                ]
            }
        ],
        "property-no-vendor-prefix": [
            true,
            {
                "ignoreProperties": ["user-select"]
            }
        ]
    }
}