Tips for creating type-safe expressions for @Input() in Angular 2 and above?

What's the best way to create a function using @Input() in an Angular component?

For instance, when defining a method that should return a boolean value:

@Input callback:

//(only allow methods with boolean return value)

@Input callback: Function

// I'd rather restrict it to just boolean-returning functions.

Answer №1

Establish a new category.

export category MyInput = () => boolean;

@Input() action: MyInput;

To learn further, check out this helpful resource on Feasible Type Operations in Functions

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