I am getting the following error while I define the type of file object inside state, Argument of type ‘null’ is not assignable to parameter of type ‘File | (() => File)’.ts. I am having a upload component, that basically takes care of selecting the file and sending its value to the…
Tag: typescript-typings
Why does the filter() function not return my expected type-filtered array?
I think I have a misconception with Typescript. As I understand, after the filter function there will be no undefined in the array. So the return value of filter function will be initialization value of box variable I can fix it in this way, but I would rather use the same logic as short way as possible: How …
TypeScript : What is the right way to define types
I’m a little confused with the assignment of typescript types. In my example I want to know how I define the type of props that will not be “any type” and also how I define the type of the title, handleOnPress, svg parameters of the SideMenuItem function Answer Define the prop types for your…
How to import a js Module as any. (Without any declaration file (d.ts))
So I want to import a js module in my ts app. Is there a way to do this without making a d.ts file or if not how to declare it as any in the d.ts file? I am currently just ignoring this error with //@ts-ignore. Thanks! Answer There are two cases here: You are using ESM modules, and only
Typescript map string literal types to uppercase
I would like to have a type b like So I tried But that does not do what I want it to do. Thank you for reading 🙂 Answer You can now do this with the introduction of Template Literal Types: TS Playground In addition to Uppercase<StringType>, there are also the following helper types: Lowercase Capitalize…