Using a type as indexer
up vote
0
down vote
favorite
I have set an enum like this:
type Mode = 'Auto' | 'Manual';
I now want to create an object where they keys must be one of the strings from Mode enum.
I tried this:
class Form extends React.Component {
fields:
[index: ExecutionMode]: string
=
Auto: ,
Manual: ,
;
However this gives me error:
[ts] An index signature parameter type cannot be a type alias. Consider writing '[index: string]: string' instead.
Is this possible in typescript?
typescript
asked Nov 10 at 1:15
Noitidart
17.3k1358148
add a comment |
up vote
0
down vote
favorite
I have set an enum like this:
type Mode = 'Auto' | 'Manual';
I now want to create an object where they keys must be one of the strings from Mode enum.
I tried this:
class Form extends React.Component {
fields:
[index: ExecutionMode]: string
=
Auto: ,
Manual: ,
;
However this gives me error:
[ts] An index signature parameter type cannot be a type alias. Consider writing '[index: string]: string' instead.
Is this possible in typescript?
typescript
asked Nov 10 at 1:15
Noitidart
17.3k1358148
2
Possible duplicate of TypeScript: typings based on object keys that come from enum
– jcalz
Nov 10 at 1:19
2
Why you call this enumtype Mode = 'Auto' | 'Manual';when it is a union? Did you mis-call it, or did you wrote wrong code here.
– Nurbol Alpysbayev
Nov 10 at 1:30
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have set an enum like this:
type Mode = 'Auto' | 'Manual';
I now want to create an object where they keys must be one of the strings from Mode enum.
I tried this:
class Form extends React.Component {
fields:
[index: ExecutionMode]: string
=
Auto: ,
Manual: ,
;
However this gives me error:
[ts] An index signature parameter type cannot be a type alias. Consider writing '[index: string]: string' instead.
Is this possible in typescript?
typescript
asked Nov 10 at 1:15
Noitidart
17.3k1358148
I have set an enum like this:
type Mode = 'Auto' | 'Manual';
I now want to create an object where they keys must be one of the strings from Mode enum.
I tried this:
class Form extends React.Component {
fields:
[index: ExecutionMode]: string
=
Auto: ,
Manual: ,
;
However this gives me error:
[ts] An index signature parameter type cannot be a type alias. Consider writing '[index: string]: string' instead.
Is this possible in typescript?
typescript
typescript
asked Nov 10 at 1:15
Noitidart
17.3k1358148
asked Nov 10 at 1:15
Noitidart
17.3k1358148
edited Nov 10 at 1:20
asked Nov 10 at 1:15
Noitidart
17.3k1358148
asked Nov 10 at 1:15
Noitidart
17.3k1358148
asked Nov 10 at 1:15
Noitidart
17.3k1358148
17.3k1358148
2
Possible duplicate of TypeScript: typings based on object keys that come from enum
– jcalz
Nov 10 at 1:19
2
Why you call this enumtype Mode = 'Auto' | 'Manual';when it is a union? Did you mis-call it, or did you wrote wrong code here.
– Nurbol Alpysbayev
Nov 10 at 1:30
add a comment |
2
Possible duplicate of TypeScript: typings based on object keys that come from enum
– jcalz
Nov 10 at 1:19
2
Why you call this enumtype Mode = 'Auto' | 'Manual';when it is a union? Did you mis-call it, or did you wrote wrong code here.
– Nurbol Alpysbayev
Nov 10 at 1:30
2
2
Possible duplicate of TypeScript: typings based on object keys that come from enum
– jcalz
Nov 10 at 1:19
Possible duplicate of TypeScript: typings based on object keys that come from enum
– jcalz
Nov 10 at 1:19
2
2
Why you call this enum
type Mode = 'Auto' | 'Manual'; when it is a union? Did you mis-call it, or did you wrote wrong code here.– Nurbol Alpysbayev
Nov 10 at 1:30
Why you call this enum
type Mode = 'Auto' | 'Manual'; when it is a union? Did you mis-call it, or did you wrote wrong code here.– Nurbol Alpysbayev
Nov 10 at 1:30
add a comment |
1 Answer
1
active
oldest
votes
up vote
3
down vote
accepted
Here you are
type Mode = 'Auto' | 'Manual';
type Fields =
[K in Mode]: string
// inside your class:
fields: Fields =
Auto: ,
Manual:
BTW, what you are calling "enum" is a "union".
answered Nov 10 at 1:32
Nurbol Alpysbayev
2,1801220
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
Here you are
type Mode = 'Auto' | 'Manual';
type Fields =
[K in Mode]: string
// inside your class:
fields: Fields =
Auto: ,
Manual:
BTW, what you are calling "enum" is a "union".
answered Nov 10 at 1:32
Nurbol Alpysbayev
2,1801220
add a comment |
up vote
3
down vote
accepted
Here you are
type Mode = 'Auto' | 'Manual';
type Fields =
[K in Mode]: string
// inside your class:
fields: Fields =
Auto: ,
Manual:
BTW, what you are calling "enum" is a "union".
answered Nov 10 at 1:32
Nurbol Alpysbayev
2,1801220
add a comment |
up vote
3
down vote
accepted
up vote
3
down vote
accepted
Here you are
type Mode = 'Auto' | 'Manual';
type Fields =
[K in Mode]: string
// inside your class:
fields: Fields =
Auto: ,
Manual:
BTW, what you are calling "enum" is a "union".
answered Nov 10 at 1:32
Nurbol Alpysbayev
2,1801220
Here you are
type Mode = 'Auto' | 'Manual';
type Fields =
[K in Mode]: string
// inside your class:
fields: Fields =
Auto: ,
Manual:
BTW, what you are calling "enum" is a "union".
answered Nov 10 at 1:32
Nurbol Alpysbayev
2,1801220
answered Nov 10 at 1:32
Nurbol Alpysbayev
2,1801220
answered Nov 10 at 1:32
Nurbol Alpysbayev
2,1801220
answered Nov 10 at 1:32
Nurbol Alpysbayev
2,1801220
2,1801220
add a comment |
add a comment |
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2
Possible duplicate of TypeScript: typings based on object keys that come from enum
– jcalz
Nov 10 at 1:19
2
Why you call this enum
type Mode = 'Auto' | 'Manual';when it is a union? Did you mis-call it, or did you wrote wrong code here.– Nurbol Alpysbayev
Nov 10 at 1:30