I forgot to mention that I replaced `implements` by `extends`
with `implements` you don't call `super()` but you still need to implement
the constructor.
class Oldman implements Person{
private massageService : MassageService;
constructor(massageService: MassageService){ // you can't avoid
implementing the constructor in each subclass
}
}
On Friday, February 5, 2016 at 12:14:02 PM UTC+1, Günter Zöchbauer wrote:
>
> class Oldman extends Person{
> constructor(massageService: MassageService){ // you can't avoid
> implementing the constructor in each subclass
> super(messageService); // super must be first line in constructor
>
> }
> }
>
> On Friday, February 5, 2016 at 12:55:11 AM UTC+1, Long Field wrote:
>>
>> Hi All
>> Basically, super class has construction injection and child class
>> implement super class, how to do this? below link gives a solution, but I
>> am not sure what it is,
>>
>>
>> http://willseitz-code.blogspot.com.au/2015/08/angular-and-typescript-inheritance-and.html?showComment=1454628375575
>>
>>
>> @Injectable()
>> class MassageService{
>> public getMassage(){ console.log("relax!")}
>> }
>>
>> @Component({
>> providers [MassageService]
>> })
>>
>> class Person{
>> private massageService : MassageService;
>> constructor(massageService: MassageService)
>> }
>>
>>
>> *****************************
>> class Oldman implements Person{
>> constructor(){} ????????????
>> }
>>
>
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