I'm trying to make a settings system for my desktop app. having a config that includes several settings like add_while_paused, min_chars, and startup_settings (
This is very much like my other question, but this time using classes instead of plain objects. class Error1 extends Error { constructor(message: string, pu
Suppose the following example class class X<T> { constructor(readonly t: Extract<'a' | 'b', T>) {} } The point is that the type function Extract
I would like to dynamically generate some tests, for that I have to call a method with the method name to be called and then all the test setup is done and the
Playground link I have these general definitions: type Module<P extends Payloads, C extends Children> = { payloads: P; children: C; }; type Child
I have a type: type Action<I extends unknown[], O> = (...args: I) => Promise<O>; and some test cases: // should be [boolean, s
I've been trying to make a type whose indexer has a return type which is based upon a string literal for the key. export enum Units { Enum = 'enum', Str
Is it possible to achieve the folowing in Typescript: I want the type of state.initial to be deduced as a tuple based on the input to the takeConfig. It would a
I was not able to find an answer to the question why function thisDoesNotWork causes an error. In contrast, function thisWorks transpiles the line anyArgs.whate
I'd like to write a function which gets a value from an object given an array of property keys. It would look something like this: function getValue<O, K ext
This class holds either a single Item or an array of items Item[], determined by a setting at runtime (this.config.isMultiple). How can I narrow down the class'
I have this code, which works just fine in a simple case, meaning the "permissionList" const is type inferred, VSCode can suggest me the properties, such as "pe
The editor is showing Type 'Promise' is not assignable to type 'void | Destructor'. for the checkUserLoggedIn() call in useEffect. I can get rid of it by doin
I created a function that creates an array from a given shape with typescript. But how do I specify the return type of that function as it will vary depending o
I have two classes User and Model User class extends Base class Model. class User extends Model {} Model class has a static method createFrom static createFrom
Say I create an instance of my class like: var x = new SomeClass<SomeModel>() Where the definitions are: interface SomeModel{ someString: string so
Demo: https://tsplay.dev/Nnavaw So I have an array with the following definition: Array<{ id?: string; text?: string; date?: Date; }>
Is there any trick to "evaluate" the type of a generic fuction? Consider the following: type Arr = <A>() => A[] type Ev<G, A> = ??? Question: I
I'm trying to build a type with two layers from a flat union type Here's my code: type TextVariants = | { size: 'tiny' // available variants for t
I'm confused about the generic union type in Record. This is my code (TypeScript version: 4.6.3): const fn = <T extends number | string = string>() =&g