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.

Es werden keine Implementierungsdateien oder Tests genannt. Beginne mit dem verknüpften TypeScript Playground-Beispiel und überprüfe, wie sich Vorschläge für Callback-Parameter derzeit im Editor verhalten. Als erledigt gilt die Aufgabe, wenn Argumentnamen aus einer Callback-Typdefinition als Vorschläge angeboten werden, ohne das ausgegebene JavaScript zu ändern.