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Why are rest parameters undefined in TypeScript?
I have a React Native app that I'm programming with TypeScript (3.6.3). I have the following code (the actual code is from an API library but this is a minimum reproducable example):class Base{...
View ArticleNetwork request failed with react-native and graphql
I have a react-native app, that has a GraphQL client to get the content from my server on Heroku.This is how my GraphQL client on the app looks like:// API_ENDPOINT: https://my-app.herokuapp.com const...
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Animated view squeeze the text components after animation in react-native app
After animation my text components squeezes inside of Animated.View. For example if i have 4 lines of text and only 2 of them just shows on the screen. And i made a lot of manipulation like put flex=1,...
View Articlewhat is the proper return type for the "onPress" of my Navigation Button?
tsc is alerting me to add return types after the render method, and after onPress of my class component. I've tried using React.ReactNode as the render return type, which makes the alert go away, but...
View Article[TypeError: s.httpService.post is not a function.line: 541, column: 2099,...
I am getting following error while running react native application in release mode,[TypeError: s.httpService.post is not a function. (In 's.httpService.post(o,l,!1)', 's.httpService.post' is...
View ArticleMake TypeScript function accept Redux connected component
I've got a React Native project where I've got a Screen class, and HomeScreen, MyProfileScreen classes derived from it (I know, composition preferred over inheritance, but let's keep that argument...
View ArticleHow to integrate types defined in an external file in a React Typescript project
I have a Typescript based React Native project where i want to externalize - and thus reuse - type definitions like interface, enum etc in a file(or perhaps a few files within a directory). My...
View ArticleHow do we get nested object type in typescript
I have the following typescript interface:UserInfo: { user: { options: ReadonlyArray<{ values: ReadonlyArray<{ value: string | null; } } } I want to access the options how do I get it. I tried...
View ArticleHow to access React child element props in a type safe manner with TypeScript?
I'm trying to access props of a React [Native] component in my app (which are guaranteed to be instance of element of my custom type ItemTemplate:const children =...
View ArticleReact (Native) Architecture and state management
Trying to understand the best practice for React/React Native state. Coming from the Java world, I tend to follow MVC/MVVM in my applications, but reading about other approaches makes me wonder if I am...
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Type issue in Typescript React-native styled-component
I am trying to create a TouchableOpacity using styled-component in react-native and was working successfully but since i am using typescript its showing some error when using style flowDirection:...
View ArticleForwardRef on a custom component typescript
I'm trying to access a children component function from his parent using references.I've my parent component :const Parent: FC = (props) => { let childRef = useRef(null); const handle = () => {...
View ArticleText Color not changing in React Native
So I'm messing with React Native using Typescript, im trying to implement a dark mode system (once I have it working it will be going into Redux State) however, My Background is changing colour but my...
View ArticleReact Native stylesheet merge: Spread types may only be created from object...
I'm trying to merge an existing style with my extra styling in React Native's regular StyleSheet.create method:const styles = StyleSheet.create({ blurView:{ ...StyleSheet.absoluteFill, borderRadius: 24...
View ArticleJavascript: Unexpected token { - occurs when try to import custom class in...
I am writing simple CLI scripts for react-native project. But I am not available to import class from typescript to javascript. It throw me following error.import { TestResult } from...
View ArticleThe most important aspects when transitioning from React Native to Flutter
Before starting a project, I always want to figure out the best ways to organize the project - the most important concepts are: How to structure modules/components, ... , and which suitable patterns...
View ArticleDelete a key from a copy of Map object
I'm trying to delete a key of my react-native state Map object.const [errors, setErrors] = useState<Map<string, string>>(null); let copy: Map<string,string> = {...errors} copy["a"] =...
View ArticleHow to get value of AnimatedInterpolation
My question is how to retrieve the value of an AnimatedInterpolation in react-native, without calling private code.I create the animated value and wrap it in an interpolation like this: animated = new...
View ArticleError: [class] is not a constructor when importing npm module in react-native...
I'm writing react-native application and using npm module @waves/signature-adapter. When I make import { Seed } from '@waves/signature-generator'; compiler returns an error undefined is not a...
View Articlehow to create state array react hooks on declaration
How do I create a state array with react hooks? I am passing a Type I used this method but it's showing me lint error. I also want to know it's the correct methodconst [myList, setList] =...
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