CODEWITHSUNDEEP
angulartypescript
Patrick
Patrick

Reputation: 251

How to typesafe expression for @Input() in angular 2+?

How to define a function for a the @Input() in an Angular component?

For example to define a method which returns a boolean value:

@Input callback: //(allow just methods with boolean return value)

@Input callback: Function // this is not what i prefere since it accepts all type of functions.

Upvotes: 1

Views: 280

Answers (1)

Totati
Totati

Reputation: 1582

Create a type.

export type MyInput = () => boolean;

@Input() callback: MyInput;

Here you can read more about Function type expressions

Upvotes: 2

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