Is it possible to use HostBinding with an unnamed arrow function?

Utilizing @HostBinding to connect the results of a function to the host element's visible attribute:

@HostBinding('attr.visible')
private get visibleAttr(): any {
  return this._visible ? '' : null;
}

The name of the function appears unnecessary as it will never be invoked by anything else. I attempted to define it as an anonymous lambda function but encountered issues:

@HostBinding('attr.visible') (() => {
  return this._visible ? '' : null;
})

Is there a method to declare this function anonymously, or at least using a lambda? Or does Angular framework require it to have a specific name?

angulartypescript

Answer №1

@HostBinding is a decorator that requires a valid member to decorate. Assuming your second code snippet 

(() => {
  return this._visible ? '' : null;
})

standing alone as a valid member could potentially work, however, it is not considered valid typescript (or javascript) for a member declaration. Therefore, it will not function as expected.

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