How can I pass additional arguments to a property decorator in TypeScript?
It can be done by using a decorator factory.
The factory, is just a function that receives any parameters you want and returns a function with a decorator signature:
// any parameters, even optional ones!function collectionMember(a: string, b?: number) { // the original decorator function actualDecorator(target: Object, property: string | symbol): void { // do something with the stuff console.log(a); console.log(target); } // return the decorator return actualDecorator;}And then you can use it as you described.
class MyClass { @collectionMember('MyProp') // 2nd parameter is not needed for this array public myProperty: number[] = [1, 2, 3, 4, 5]; // ...}