typescript-play | Better TypeScript playground | Frontend Framework library
kandi X-RAY | typescript-play Summary
kandi X-RAY | typescript-play Summary
️ Please use the offical TypeScript playground, now it has all the same features and even more. Use for issues and questions. A better TypeScript playground.
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Top functions reviewed by kandi - BETA
- Main execution function
- Preform formatting function
- Generates title text for the current compiler option
- Update the output
- Create file .
- Run JavaScript synchronously .
typescript-play Key Features
typescript-play Examples and Code Snippets
Community Discussions
Trending Discussions on typescript-play
QUESTION
Is it possible to narrow type output of a factory create method by literal types? I've managed to get some narrowing with if statements and discriminated unions, but this is creational method so I'm not sure whether it's possible.
...ANSWER
Answered 2022-Mar-05 at 08:05How about this...
QUESTION
I'm following the tutorial on mui's website to get the version 5 of the framework in place. Everything is fine except that I cannot figure out how to make the styled components work.
Here is a minimal example with a sandbox to try it out:
...ANSWER
Answered 2022-Jan-22 at 13:59You can replace this code to make it work
QUESTION
The goal is to declare a Record type definition for a mapper in order to restrict the keys and function values.
The arguments of those functions have different behaviors, thus are defined using a union type.
PushNotificationPayloadVideoComment is part of PushNotificationPayload union type, but the TS compiler detects that it's not assignable to its union
TypeScript version: 4.3.2
...ANSWER
Answered 2022-Jan-21 at 10:18Using unknown means the function assigned should be capable to handle any parameter type, and you are using functions that can only handle a specific type.
You could use a custom mapped type to map each callback to the appropriate parameter type:
QUESTION
I get an unclear TS-Error. Sure this is an easy one, but it seems to have so many facets I don't know how to search for it properly. I kinda know it's related to "noImplicitAny" and "strictNullChecks" in TS-Config. Please don't only post a solution but shed some light on what this error is and what the compiler is trying to say.
...ANSWER
Answered 2021-Dec-29 at 19:56The problem is that the compiler doesn't know that value is of the type corresponding to fieldId.
I solved it by extracting the key type:
QUESTION
The typescript playground is giving me the following errors:
No overload matches this call. Overload 1 of 3, '(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue: T): T', gave the following error. Type 'T[]' is not assignable to type 'T'. 'T' could be instantiated with an arbitrary type which could be unrelated to 'T[]'. Overload 2 of 3, '(callbackfn: (previousValue: never[], currentValue: T, currentIndex: number, array: T[]) => never[], initialValue: never[]): never[]', gave the following error. Type 'T[]' is not assignable to type 'never[]'. Type 'T' is not assignable to type 'never'.
and
...Type 'T' is not assignable to type 'T[]'.
ANSWER
Answered 2021-Nov-26 at 09:09I don't know which version or config is used in stackbliz so it is hard to say why you are not getting error.
However, the problem is in empty array because empty array, by the default, is infered as never[].
In order to fix this error, you need to use explicit argument for reduce.
QUESTION
I have a generic component with a generic type, which extends required id property GenericComponent = . Also I have the interface where id is not required:
ANSWER
Answered 2021-Nov-15 at 16:45There's no way to do what you want.
GenericComponent requires a type that is a subtype of { id: number }. { id?: number } (or { id: number | undefined }) is not compatible with that. In short, GenericComponent assumes that id is always going to be a number - you can't provide it with undefined or no value.
{ id?: number } is a supertype of { id: number }, much like how in classic OOP examples an Animal is a supertype of Cat, and you cannot provide an Animal to an interface that specifically requires a Cat.
The only way to do this is with some kind of wrapper, either like you've written in your example or perhaps by writing a higher-order component. Alternatively, just stick with an if statement - no need to write complicated code when simple code does the job.
QUESTION
I test some components that wrap children and want to make a function that renders them with some children added. How can we do this with Typescript without losing type-safety? See comments in the code below:
...ANSWER
Answered 2021-Oct-21 at 10:37Here is a working version.
Props needs to extend PropsWithChildren, like so:
QUESTION
I want to obtain all the types of the record's values. For example if I have an object like this:
...ANSWER
Answered 2021-Sep-11 at 00:12First of all, you can't annotate obj as being of type Record void> without throwing away all information about the particular method names and arguments in the initializer. If you want the output type of convert(context, obj) to know about log and add, then you should probably just assign to obj without annotating at all; let the compiler infer its type:
QUESTION
I think I understand that prefix react prop is colliding with html attribute prefix here.
What I don't understand is why typescript use html prefix when this is a react prop?
Thanks
https://codesandbox.io/s/typescript-playground-export-forked-qb0nd?file=/index.tsx
...ANSWER
Answered 2021-Aug-24 at 08:08Because you're using intersection type & and it works like that if both of types have the same name of field. You can avoid it like this:
QUESTION
I'm trying to make a React component which takes in a generic type parameter which will be part of its prop type.
I want a solution that would look something like this:
...ANSWER
Answered 2021-Aug-12 at 12:25The easiest way is to make the generic FC a regular function, not an arrow function. (React.PropsWithChildren<> emulates what React.FC does to your props type.)
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