Suggest argument names based on type definition of callback functions

Search Terms

callback, arguments, parameters, suggestion, auto correct

Suggestion

Let's say I have a type definition for my function like this:

function acceptsCallback(callback: (argumentNameThatIsVeryLong: string) => void) {}

When using it, that argumentNameThatIsVeryLong is a very good candidate for my argument name. I want to accept it but there is no way but typing it:

Use Cases

When users are extremely lazy this is very handy! ;) In all seriousness this can avoid bugs by suggesting the right argument name. For instance when req and res objects are misplaced in an Express middleware by mistake

Examples

https://www.typescriptlang.org/play?#code/GYVwdgxgLglg9mABAQwhApgBygZwMLIA2hARqgNYAUERpFAXIpcgE4DmIAtumFAHLJuAFQAWyKAEkcANXQsAngBkEbRjigsYYNgEpEAXgB8iAG5wYAEz0BvAL4Aoe6gzZ8tMhCqPv95ux32OkA

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.

Non sono indicati file di implementazione né test. Inizia dall’esempio collegato di TypeScript Playground e verifica come si comportano attualmente nell’editor i suggerimenti per i parametri di callback. Il lavoro è completato quando i nomi degli argomenti di una definizione di tipo callback vengono offerti come suggerimenti senza modificare il JavaScript emesso.