watch

Annotation for watching changes to a property and a getter

@watch by default unwraps boxed observables, arrays, sets, and maps — meaning it uses shallow comparison. If you don't want this behavior, use @watch.ref instead.

• @observable and @computed (and their variants) are automatically assumed to be @watched,
  unless @unwatch or @unwatch.ref is specified.
• @nested (and its variants) are considered @watched unless @unwatch is specified.
• If @watch and @watch.ref are specified for the same key (in the same inheritance chain),
  the last annotation prevails.

Call Signature

watch(target, propertyKey): void

Defined in: watcher.ts:56

Parameters

target

object

propertyKey

string | symbol

Returns

void

Call Signature

watch(value, context): void | ((this: object) => any)

Defined in: watcher.ts:56

Parameters

value

(this: object) => any

context

ClassGetterDecoratorContext

Returns

void | ((this: object) => any)

Call Signature

watch(value, context): void | ClassAccessorDecoratorResult<object, any>

Defined in: watcher.ts:56

Parameters

value

ClassAccessorDecoratorTarget<object, any>

context

ClassAccessorDecoratorContext

Returns

void | ClassAccessorDecoratorResult<object, any>

Call Signature

watch(value, context): any

Defined in: watcher.ts:56

Parameters

value

undefined

context

ClassFieldDecoratorContext<object, any>

Returns

any

Properties

ref

ref: PropertyDecorator<object> & ClassGetterDecorator<object, any> & ClassAccessorDecorator<object, any> & ClassFieldDecorator<object, any> = createWatchRef

Defined in: watcher.ts:65

Function

Annotation for watching values with identity comparison

It has no effect when combined with @nested.