Registered custom propertiesThe CSS.registerProperty() static method and the @property CSS at-rule register custom properties for which types and behaviors can be defined.newly2024-07-09https://drafts.css-houdini.org/css-properties-values-api-1/https://developer.mozilla.org/docs/Web/API/CSSPropertyRuleapi.CSS.registerProperty_staticapi.CSSPropertyRuleapi.CSSPropertyRule.inheritsapi.CSSPropertyRule.initialValueapi.CSSPropertyRule.nameapi.CSSPropertyRule.syntaxcss.at-rules.propertycss.at-rules.property.inheritscss.at-rules.property.initial-valuecss.at-rules.property.syntaxhttps://nowyoucanuse.com/features--registered-custom-properties.html