The target object
The expression to observe
The async handler to call when the expression changes
Optional
opt: HandlerOptions<NoInfer<Expr>>The handler options
A function to remove the handler
Make a target object validatable
It's just a shorthand of:
Validator.get(target).addSyncHandler(handler, opt)
The target object
The sync handler containing observable expressions
Optional
opt: HandlerOptions<unknown>The handler options
A function to remove the handler
Make a target object validatable
It's just a shorthand of: