TS 3.9+ missing registerProperty method in CSS #38593

Activity

1. Ryan Cavanaugh (RyanCavanaugh)

   added

   BugA bug in TypeScriptA bug in TypeScript

   Domain: lib.d.tsThe issue relates to the different libraries shipped with TypeScriptThe issue relates to the different libraries shipped with TypeScript

   Help WantedYou can do thisYou can do this

   on Jun 8, 2020
2. Ryan Cavanaugh (RyanCavanaugh)

   added this to the Backlog milestone on Jun 8, 2020
3. Nathan Shively-Sanders (sandersn)

   added

   GraceHopperOSD

   on Sep 18, 2020
4. BarnT commented on Mar 14, 2021

   

   BarnT (BarnT)

   on Mar 14, 2021

   More actions

   Also CSS.paintWorklet.addModule() throws error:
   "Property 'paintWorklet' does not exist on type 'typeof CSS'."
5. kongxiangyan commented on Dec 29, 2021

   

   孔祥岩 (kongxiangyan)

   on Dec 29, 2021

   Last edited by kongxiangyan

   More actions

   interface CSS {
     registerProperty: (any) => any
   }

   I am encountering the same problem, if you hadn't solve it, use namespace instead of interface.

   Here is my code, all definition is refer to CSS.registerProperty() - MDN

   declare namespace CSS {
     interface PropertyDefinition {
       name: string
       syntax?: string
       inherits: boolean
       initialValue?: string
     }
     function registerProperty (propertyDefinition: PropertyDefinition): undefined
   }

   Playground Link:

   • v4.5.4 Playground Link (No Errors)
6. scriptex commented on Mar 31, 2022

   

   Atanas Atanasov (scriptex)

   on Mar 31, 2022

   More actions

   Also CSS.paintWorklet.addModule() throws error: "Property 'paintWorklet' does not exist on type 'typeof CSS'."

   I fixed this with the following code:

   declare namespace CSS {
   	namespace paintWorklet {
   		export function addModule(url: URL): void;
   	}
   }

   👍React with 👍3Reacted by Stuart Tett, mkdirnow and Wessel Kroos
7. jakebailey commented on Jul 9, 2023

   

   Jake Bailey (jakebailey)

   on Jul 9, 2023

   Member

   More actions

   This was fixed in #53133, which restored CSS as a namespace.
8. Jake Bailey (jakebailey)

   closed this as completedon Jul 9, 2023
9. microsoft

   locked as resolved and limited conversation to collaborators on Oct 21, 2025