Reusable function type
0
I'm trying declare a function type and then use that in a class, and in objects, and interfaces like this:
declare function IUpdateMode(mode: Mode): void;
Then I want to use it like this:
type Foo =
updateMode: IUpdateMode
class Foo extends React.Component<any>
updateRedMode(mode): IUpdateMode
function updateGreenMode(mode): IUpdateMode
Is this possible in typescript?
typescript
asked Nov 10 at 1:43
Noitidart
17.5k1360150
add a comment |
0
I'm trying declare a function type and then use that in a class, and in objects, and interfaces like this:
declare function IUpdateMode(mode: Mode): void;
Then I want to use it like this:
type Foo =
updateMode: IUpdateMode
class Foo extends React.Component<any>
updateRedMode(mode): IUpdateMode
function updateGreenMode(mode): IUpdateMode
Is this possible in typescript?
typescript
asked Nov 10 at 1:43
Noitidart
17.5k1360150
add a comment |
0
0
0
I'm trying declare a function type and then use that in a class, and in objects, and interfaces like this:
declare function IUpdateMode(mode: Mode): void;
Then I want to use it like this:
type Foo =
updateMode: IUpdateMode
class Foo extends React.Component<any>
updateRedMode(mode): IUpdateMode
function updateGreenMode(mode): IUpdateMode
Is this possible in typescript?
typescript
asked Nov 10 at 1:43
Noitidart
17.5k1360150
I'm trying declare a function type and then use that in a class, and in objects, and interfaces like this:
declare function IUpdateMode(mode: Mode): void;
Then I want to use it like this:
type Foo =
updateMode: IUpdateMode
class Foo extends React.Component<any>
updateRedMode(mode): IUpdateMode
function updateGreenMode(mode): IUpdateMode
Is this possible in typescript?
typescript
typescript
asked Nov 10 at 1:43
Noitidart
17.5k1360150
asked Nov 10 at 1:43
Noitidart
17.5k1360150
asked Nov 10 at 1:43
Noitidart
17.5k1360150
asked Nov 10 at 1:43
Noitidart
17.5k1360150
asked Nov 10 at 1:43
Noitidart
17.5k1360150
17.5k1360150
add a comment |
add a comment |
1 Answer
1
active
oldest
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1
I think what you really want is just this:
type UpdateMode = (mode: Mode) => void
Now you can use it anywhere as you mentioned, but with some corrections:
interface IFoo // interface instead of a type is preferable when possible (e.g. you may extend it)
updateMode: UpdateMode
class Foo extends React.Component<any> implements IFoo
updateMode = (mode: Mode) =>
const updateGreenMode: UpdateMode = (mode) => // there is no way to restrict a classic function to type alias or interface
answered Nov 10 at 1:57
Nurbol Alpysbayev
3,3341225
Oh thank you! Is it not possible to use this with thefunction upgradeGreenMod()style?
– Noitidart
Nov 10 at 2:00
1
You are welcome! No, it's not possible unfortunately, to restrict a classic function to some type alias or interface.
– Nurbol Alpysbayev
Nov 10 at 2:01
1
I've polished the answer a bit more. e.g. the (non-mandatory, for-convenience) convention is to add "I" character to the beginning of interfaces, not types. Also class should implementIfoointerface
– Nurbol Alpysbayev
Nov 10 at 2:06
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
I think what you really want is just this:
type UpdateMode = (mode: Mode) => void
Now you can use it anywhere as you mentioned, but with some corrections:
interface IFoo // interface instead of a type is preferable when possible (e.g. you may extend it)
updateMode: UpdateMode
class Foo extends React.Component<any> implements IFoo
updateMode = (mode: Mode) =>
const updateGreenMode: UpdateMode = (mode) => // there is no way to restrict a classic function to type alias or interface
answered Nov 10 at 1:57
Nurbol Alpysbayev
3,3341225
Oh thank you! Is it not possible to use this with thefunction upgradeGreenMod()style?
– Noitidart
Nov 10 at 2:00
1
You are welcome! No, it's not possible unfortunately, to restrict a classic function to some type alias or interface.
– Nurbol Alpysbayev
Nov 10 at 2:01
1
I've polished the answer a bit more. e.g. the (non-mandatory, for-convenience) convention is to add "I" character to the beginning of interfaces, not types. Also class should implementIfoointerface
– Nurbol Alpysbayev
Nov 10 at 2:06
add a comment |
1
I think what you really want is just this:
type UpdateMode = (mode: Mode) => void
Now you can use it anywhere as you mentioned, but with some corrections:
interface IFoo // interface instead of a type is preferable when possible (e.g. you may extend it)
updateMode: UpdateMode
class Foo extends React.Component<any> implements IFoo
updateMode = (mode: Mode) =>
const updateGreenMode: UpdateMode = (mode) => // there is no way to restrict a classic function to type alias or interface
answered Nov 10 at 1:57
Nurbol Alpysbayev
3,3341225
Oh thank you! Is it not possible to use this with thefunction upgradeGreenMod()style?
– Noitidart
Nov 10 at 2:00
1
You are welcome! No, it's not possible unfortunately, to restrict a classic function to some type alias or interface.
– Nurbol Alpysbayev
Nov 10 at 2:01
1
I've polished the answer a bit more. e.g. the (non-mandatory, for-convenience) convention is to add "I" character to the beginning of interfaces, not types. Also class should implementIfoointerface
– Nurbol Alpysbayev
Nov 10 at 2:06
add a comment |
1
1
1
I think what you really want is just this:
type UpdateMode = (mode: Mode) => void
Now you can use it anywhere as you mentioned, but with some corrections:
interface IFoo // interface instead of a type is preferable when possible (e.g. you may extend it)
updateMode: UpdateMode
class Foo extends React.Component<any> implements IFoo
updateMode = (mode: Mode) =>
const updateGreenMode: UpdateMode = (mode) => // there is no way to restrict a classic function to type alias or interface
answered Nov 10 at 1:57
Nurbol Alpysbayev
3,3341225
I think what you really want is just this:
type UpdateMode = (mode: Mode) => void
Now you can use it anywhere as you mentioned, but with some corrections:
interface IFoo // interface instead of a type is preferable when possible (e.g. you may extend it)
updateMode: UpdateMode
class Foo extends React.Component<any> implements IFoo
updateMode = (mode: Mode) =>
const updateGreenMode: UpdateMode = (mode) => // there is no way to restrict a classic function to type alias or interface
answered Nov 10 at 1:57
Nurbol Alpysbayev
3,3341225
edited Nov 10 at 2:10
answered Nov 10 at 1:57
Nurbol Alpysbayev
3,3341225
answered Nov 10 at 1:57
Nurbol Alpysbayev
3,3341225
answered Nov 10 at 1:57
Nurbol Alpysbayev
3,3341225
3,3341225
Oh thank you! Is it not possible to use this with thefunction upgradeGreenMod()style?
– Noitidart
Nov 10 at 2:00
1
You are welcome! No, it's not possible unfortunately, to restrict a classic function to some type alias or interface.
– Nurbol Alpysbayev
Nov 10 at 2:01
1
I've polished the answer a bit more. e.g. the (non-mandatory, for-convenience) convention is to add "I" character to the beginning of interfaces, not types. Also class should implementIfoointerface
– Nurbol Alpysbayev
Nov 10 at 2:06
add a comment |
Oh thank you! Is it not possible to use this with thefunction upgradeGreenMod()style?
– Noitidart
Nov 10 at 2:00
1
You are welcome! No, it's not possible unfortunately, to restrict a classic function to some type alias or interface.
– Nurbol Alpysbayev
Nov 10 at 2:01
1
I've polished the answer a bit more. e.g. the (non-mandatory, for-convenience) convention is to add "I" character to the beginning of interfaces, not types. Also class should implementIfoointerface
– Nurbol Alpysbayev
Nov 10 at 2:06
Oh thank you! Is it not possible to use this with the
function upgradeGreenMod() style?– Noitidart
Nov 10 at 2:00
Oh thank you! Is it not possible to use this with the
function upgradeGreenMod() style?– Noitidart
Nov 10 at 2:00
1
1
You are welcome! No, it's not possible unfortunately, to restrict a classic function to some type alias or interface.
– Nurbol Alpysbayev
Nov 10 at 2:01
You are welcome! No, it's not possible unfortunately, to restrict a classic function to some type alias or interface.
– Nurbol Alpysbayev
Nov 10 at 2:01
1
1
I've polished the answer a bit more. e.g. the (non-mandatory, for-convenience) convention is to add "I" character to the beginning of interfaces, not types. Also class should implement
Ifoo interface– Nurbol Alpysbayev
Nov 10 at 2:06
I've polished the answer a bit more. e.g. the (non-mandatory, for-convenience) convention is to add "I" character to the beginning of interfaces, not types. Also class should implement
Ifoo interface– Nurbol Alpysbayev
Nov 10 at 2:06
add a comment |
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