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Guide
TypeScript.Wire
DEV
Reference

Guide
TypeScript.Wire
DEV
Reference

Xantham.Fable.Core
- Fable.Core.JS
  - JS
    Brands
    bool
    char
    string
    Intersect
    NoInfer
    PropertyRecord
    ReadonlyRecord
    Record
    keyof
    proptypekey
    proptypelock
    typekeyof
- Global
  - XanthamFableCore
    Brand
    Intersect
    KeyOf
    PropTypeBuilder
    TypeKeyOf
Xantham.Fable.Core.TS
- TS
  - Dom
    GlobalThis
    PerformanceObserverCallback
    1836 more
    2549 more
  - Es
    208 more
- TSExtensions
  - ConstrainFunction
  - Utils
Xantham.Fable.Node
- Node
  - 321 more
Xantham.Generator
Xantham.Generator.Myriad
Xantham.TypeScript.Wire
- 359 more

PerformanceObserverCallback

type PerformanceObserverCallback = PerformanceObserverCallback


Assembly	`Xantham.Fable.Core.TS`
Inherits	`MulticastDelegate`

Copyright (c) 2026 - Shayan Habibi, Houston Haynes and contributors

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