Typescript interface with private members
up vote
1
down vote
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Why typescript not supporting private members in interfaces?
How to handle the following scenario?
interface IFoo
{
private member: {};
}
class Foo implements IFoo
{
private member = {};
}
typescript
asked Nov 21 at 22:46
Ahmed M.Kamal
158212
add a comment |
up vote
1
down vote
favorite
Why typescript not supporting private members in interfaces?
How to handle the following scenario?
interface IFoo
{
private member: {};
}
class Foo implements IFoo
{
private member = {};
}
typescript
asked Nov 21 at 22:46
Ahmed M.Kamal
158212
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
Why typescript not supporting private members in interfaces?
How to handle the following scenario?
interface IFoo
{
private member: {};
}
class Foo implements IFoo
{
private member = {};
}
typescript
asked Nov 21 at 22:46
Ahmed M.Kamal
158212
Why typescript not supporting private members in interfaces?
How to handle the following scenario?
interface IFoo
{
private member: {};
}
class Foo implements IFoo
{
private member = {};
}
typescript
typescript
asked Nov 21 at 22:46
Ahmed M.Kamal
158212
asked Nov 21 at 22:46
Ahmed M.Kamal
158212
asked Nov 21 at 22:46
Ahmed M.Kamal
158212
asked Nov 21 at 22:46
Ahmed M.Kamal
158212
asked Nov 21 at 22:46
Ahmed M.Kamal
158212
158212
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
Interfaces define "public contracts", it describes the public side of the class and as such it doesn't make sense to have private access modifier.
From Typescript interface documentation:
This prohibits you from using them to check that a class also has
particular types for the private side of the class instance.
But an interface can extend classes with private memmbers.
From Understanding TypeScript:
In TypeScript, interfaces can also extend classes, but only in a way
that involves inheritance. When an interface extends a class, the
interface includes all class members (public and private), but without
the class’ implementations.
class Customer
{
private id: number;
get Id(): number
{
return this.id
}
set Id( value: number )
{
this.id = value;
}
}
interface ICustomer extends Customer
{
MiddleName: string;
}
answered Nov 21 at 23:11
Maarti
1,0481721
Thanks for explanation, but isn't this considered a weakness of the language?
– Ahmed M.Kamal
Nov 21 at 23:20
1
@AhmedM.Kamal in what way? It makes very little sense to check if the instance itself implements something, you can see it yourself right in your editor already.
– zerkms
Nov 21 at 23:21
@zerkms it makes sense for me now, thanks.
– Ahmed M.Kamal
Nov 21 at 23:34
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
Interfaces define "public contracts", it describes the public side of the class and as such it doesn't make sense to have private access modifier.
From Typescript interface documentation:
This prohibits you from using them to check that a class also has
particular types for the private side of the class instance.
But an interface can extend classes with private memmbers.
From Understanding TypeScript:
In TypeScript, interfaces can also extend classes, but only in a way
that involves inheritance. When an interface extends a class, the
interface includes all class members (public and private), but without
the class’ implementations.
class Customer
{
private id: number;
get Id(): number
{
return this.id
}
set Id( value: number )
{
this.id = value;
}
}
interface ICustomer extends Customer
{
MiddleName: string;
}
answered Nov 21 at 23:11
Maarti
1,0481721
Thanks for explanation, but isn't this considered a weakness of the language?
– Ahmed M.Kamal
Nov 21 at 23:20
1
@AhmedM.Kamal in what way? It makes very little sense to check if the instance itself implements something, you can see it yourself right in your editor already.
– zerkms
Nov 21 at 23:21
@zerkms it makes sense for me now, thanks.
– Ahmed M.Kamal
Nov 21 at 23:34
add a comment |
up vote
1
down vote
Interfaces define "public contracts", it describes the public side of the class and as such it doesn't make sense to have private access modifier.
From Typescript interface documentation:
This prohibits you from using them to check that a class also has
particular types for the private side of the class instance.
But an interface can extend classes with private memmbers.
From Understanding TypeScript:
In TypeScript, interfaces can also extend classes, but only in a way
that involves inheritance. When an interface extends a class, the
interface includes all class members (public and private), but without
the class’ implementations.
class Customer
{
private id: number;
get Id(): number
{
return this.id
}
set Id( value: number )
{
this.id = value;
}
}
interface ICustomer extends Customer
{
MiddleName: string;
}
answered Nov 21 at 23:11
Maarti
1,0481721
Thanks for explanation, but isn't this considered a weakness of the language?
– Ahmed M.Kamal
Nov 21 at 23:20
1
@AhmedM.Kamal in what way? It makes very little sense to check if the instance itself implements something, you can see it yourself right in your editor already.
– zerkms
Nov 21 at 23:21
@zerkms it makes sense for me now, thanks.
– Ahmed M.Kamal
Nov 21 at 23:34
add a comment |
up vote
1
down vote
up vote
1
down vote
Interfaces define "public contracts", it describes the public side of the class and as such it doesn't make sense to have private access modifier.
From Typescript interface documentation:
This prohibits you from using them to check that a class also has
particular types for the private side of the class instance.
But an interface can extend classes with private memmbers.
From Understanding TypeScript:
In TypeScript, interfaces can also extend classes, but only in a way
that involves inheritance. When an interface extends a class, the
interface includes all class members (public and private), but without
the class’ implementations.
class Customer
{
private id: number;
get Id(): number
{
return this.id
}
set Id( value: number )
{
this.id = value;
}
}
interface ICustomer extends Customer
{
MiddleName: string;
}
answered Nov 21 at 23:11
Maarti
1,0481721
Interfaces define "public contracts", it describes the public side of the class and as such it doesn't make sense to have private access modifier.
From Typescript interface documentation:
This prohibits you from using them to check that a class also has
particular types for the private side of the class instance.
But an interface can extend classes with private memmbers.
From Understanding TypeScript:
In TypeScript, interfaces can also extend classes, but only in a way
that involves inheritance. When an interface extends a class, the
interface includes all class members (public and private), but without
the class’ implementations.
class Customer
{
private id: number;
get Id(): number
{
return this.id
}
set Id( value: number )
{
this.id = value;
}
}
interface ICustomer extends Customer
{
MiddleName: string;
}
answered Nov 21 at 23:11
Maarti
1,0481721
edited Nov 21 at 23:23
answered Nov 21 at 23:11
Maarti
1,0481721
answered Nov 21 at 23:11
Maarti
1,0481721
answered Nov 21 at 23:11
Maarti
1,0481721
1,0481721
Thanks for explanation, but isn't this considered a weakness of the language?
– Ahmed M.Kamal
Nov 21 at 23:20
1
@AhmedM.Kamal in what way? It makes very little sense to check if the instance itself implements something, you can see it yourself right in your editor already.
– zerkms
Nov 21 at 23:21
@zerkms it makes sense for me now, thanks.
– Ahmed M.Kamal
Nov 21 at 23:34
add a comment |
Thanks for explanation, but isn't this considered a weakness of the language?
– Ahmed M.Kamal
Nov 21 at 23:20
1
@AhmedM.Kamal in what way? It makes very little sense to check if the instance itself implements something, you can see it yourself right in your editor already.
– zerkms
Nov 21 at 23:21
@zerkms it makes sense for me now, thanks.
– Ahmed M.Kamal
Nov 21 at 23:34
Thanks for explanation, but isn't this considered a weakness of the language?
– Ahmed M.Kamal
Nov 21 at 23:20
Thanks for explanation, but isn't this considered a weakness of the language?
– Ahmed M.Kamal
Nov 21 at 23:20
1
1
@AhmedM.Kamal in what way? It makes very little sense to check if the instance itself implements something, you can see it yourself right in your editor already.
– zerkms
Nov 21 at 23:21
@AhmedM.Kamal in what way? It makes very little sense to check if the instance itself implements something, you can see it yourself right in your editor already.
– zerkms
Nov 21 at 23:21
@zerkms it makes sense for me now, thanks.
– Ahmed M.Kamal
Nov 21 at 23:34
@zerkms it makes sense for me now, thanks.
– Ahmed M.Kamal
Nov 21 at 23:34
add a comment |
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