DOM suggestion: customisable `history.state` type

Search Terms

dom lib window state history any unknown

Suggestion

Currently window.history.state has type any. Could we provide a way for users to customise this type? Perhaps by making it generic or allowing the type to be changed through declaration merging.

Failing that, could we replace the any type with unknown, so we have type safety and users are forced to validate/widen the type?

Another possible solution: if TypeScript provided a way to override any types (https://github.com/microsoft/TypeScript/issues/4062, https://github.com/microsoft/TypeScript/issues/26188).

Also related:

• https://github.com/DefinitelyTyped/DefinitelyTyped/pull/41568
• https://github.com/DefinitelyTyped/DefinitelyTyped/pull/41580

Use Cases

Examples

Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

Das Issue nennt keine Dateien, Tests oder konkreten Einstiegspunkte. Beginne damit, die DOM-Deklaration für window.history.state zu finden und die verlinkten verwandten Issues zu prüfen; als abgeschlossen würde ein festgelegtes, dokumentiertes Typing-Design mit Beispielen und entsprechenden Tests gelten.