Mixing
How to use stringPropertyInitialization with Object.assign in Typescript
I have a class like
export class Config{
public doSomething: boolean;
public doSomethingOptionally?: boolean
constructor(data: {
doSomething: boolean,
doSomethingOptionally?: boolean
}) {
Object.assign(this, data);
}
}
Passing data to constructor this way is really easy and IntelliSense is smart enough to not allow developers creating new instance of Config class without specifying doSomething property, but it does without doSomethingOptionally.
All this works great, but as soon as I enable strictPropertyInitialization in tsconfig.json I get a bunch of errors because doSomething was not initialized.
What is the best workaround for this?
I don't want to:
- specify default values (objects can be really large)
- use
doSomething: boolean = {} as any;
- assign value in constructor outside the
dataproperty because there can be a lot of parameters and calling constructor would become too ugly for my taste - Make
doSomethingaccept undefined values
typescript tsconfig
asked Nov 20 '18 at 10:45
EnnEnn
1,569818
add a comment |
I have a class like
export class Config{
public doSomething: boolean;
public doSomethingOptionally?: boolean
constructor(data: {
doSomething: boolean,
doSomethingOptionally?: boolean
}) {
Object.assign(this, data);
}
}
Passing data to constructor this way is really easy and IntelliSense is smart enough to not allow developers creating new instance of Config class without specifying doSomething property, but it does without doSomethingOptionally.
All this works great, but as soon as I enable strictPropertyInitialization in tsconfig.json I get a bunch of errors because doSomething was not initialized.
What is the best workaround for this?
I don't want to:
- specify default values (objects can be really large)
- use
doSomething: boolean = {} as any;
- assign value in constructor outside the
dataproperty because there can be a lot of parameters and calling constructor would become too ugly for my taste - Make
doSomethingaccept undefined values
typescript tsconfig
asked Nov 20 '18 at 10:45
EnnEnn
1,569818
add a comment |
I have a class like
export class Config{
public doSomething: boolean;
public doSomethingOptionally?: boolean
constructor(data: {
doSomething: boolean,
doSomethingOptionally?: boolean
}) {
Object.assign(this, data);
}
}
Passing data to constructor this way is really easy and IntelliSense is smart enough to not allow developers creating new instance of Config class without specifying doSomething property, but it does without doSomethingOptionally.
All this works great, but as soon as I enable strictPropertyInitialization in tsconfig.json I get a bunch of errors because doSomething was not initialized.
What is the best workaround for this?
I don't want to:
- specify default values (objects can be really large)
- use
doSomething: boolean = {} as any;
- assign value in constructor outside the
dataproperty because there can be a lot of parameters and calling constructor would become too ugly for my taste - Make
doSomethingaccept undefined values
typescript tsconfig
asked Nov 20 '18 at 10:45
EnnEnn
1,569818
I have a class like
export class Config{
public doSomething: boolean;
public doSomethingOptionally?: boolean
constructor(data: {
doSomething: boolean,
doSomethingOptionally?: boolean
}) {
Object.assign(this, data);
}
}
Passing data to constructor this way is really easy and IntelliSense is smart enough to not allow developers creating new instance of Config class without specifying doSomething property, but it does without doSomethingOptionally.
All this works great, but as soon as I enable strictPropertyInitialization in tsconfig.json I get a bunch of errors because doSomething was not initialized.
What is the best workaround for this?
I don't want to:
- specify default values (objects can be really large)
- use
doSomething: boolean = {} as any;
- assign value in constructor outside the
dataproperty because there can be a lot of parameters and calling constructor would become too ugly for my taste - Make
doSomethingaccept undefined values
typescript tsconfig
typescript tsconfig
asked Nov 20 '18 at 10:45
EnnEnn
1,569818
asked Nov 20 '18 at 10:45
EnnEnn
1,569818
edited Nov 20 '18 at 10:51
Enn
asked Nov 20 '18 at 10:45
EnnEnn
1,569818
asked Nov 20 '18 at 10:45
EnnEnn
1,569818
asked Nov 20 '18 at 10:45
EnnEnn
1,569818
1,569818
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
One solution is to let the compiler know what properties are initialized via Object.assign using the definite assignment assertion
export class Config{
public doSomething!: boolean;
public doSomethingOptionally?: boolean
constructor(data: {
doSomething: boolean,
doSomethingOptionally?: boolean
}) {
Object.assign(this, data);
}
}
answered Nov 20 '18 at 11:04
Titian Cernicova-DragomirTitian Cernicova-Dragomir
60.4k33654
exactly what I needed, thanks!
– Enn
Nov 20 '18 at 11:09
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
One solution is to let the compiler know what properties are initialized via Object.assign using the definite assignment assertion
export class Config{
public doSomething!: boolean;
public doSomethingOptionally?: boolean
constructor(data: {
doSomething: boolean,
doSomethingOptionally?: boolean
}) {
Object.assign(this, data);
}
}
answered Nov 20 '18 at 11:04
Titian Cernicova-DragomirTitian Cernicova-Dragomir
60.4k33654
exactly what I needed, thanks!
– Enn
Nov 20 '18 at 11:09
add a comment |
One solution is to let the compiler know what properties are initialized via Object.assign using the definite assignment assertion
export class Config{
public doSomething!: boolean;
public doSomethingOptionally?: boolean
constructor(data: {
doSomething: boolean,
doSomethingOptionally?: boolean
}) {
Object.assign(this, data);
}
}
answered Nov 20 '18 at 11:04
Titian Cernicova-DragomirTitian Cernicova-Dragomir
60.4k33654
exactly what I needed, thanks!
– Enn
Nov 20 '18 at 11:09
add a comment |
One solution is to let the compiler know what properties are initialized via Object.assign using the definite assignment assertion
export class Config{
public doSomething!: boolean;
public doSomethingOptionally?: boolean
constructor(data: {
doSomething: boolean,
doSomethingOptionally?: boolean
}) {
Object.assign(this, data);
}
}
answered Nov 20 '18 at 11:04
Titian Cernicova-DragomirTitian Cernicova-Dragomir
60.4k33654
One solution is to let the compiler know what properties are initialized via Object.assign using the definite assignment assertion
export class Config{
public doSomething!: boolean;
public doSomethingOptionally?: boolean
constructor(data: {
doSomething: boolean,
doSomethingOptionally?: boolean
}) {
Object.assign(this, data);
}
}
answered Nov 20 '18 at 11:04
Titian Cernicova-DragomirTitian Cernicova-Dragomir
60.4k33654
answered Nov 20 '18 at 11:04
Titian Cernicova-DragomirTitian Cernicova-Dragomir
60.4k33654
answered Nov 20 '18 at 11:04
Titian Cernicova-DragomirTitian Cernicova-Dragomir
60.4k33654
answered Nov 20 '18 at 11:04
Titian Cernicova-DragomirTitian Cernicova-Dragomir
60.4k33654
60.4k33654
exactly what I needed, thanks!
– Enn
Nov 20 '18 at 11:09
add a comment |
exactly what I needed, thanks!
– Enn
Nov 20 '18 at 11:09
exactly what I needed, thanks!
– Enn
Nov 20 '18 at 11:09
exactly what I needed, thanks!
– Enn
Nov 20 '18 at 11:09
add a comment |
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