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React is not defined for my own React Native component library
I have made simple React Native component library for testing:import React from "react";import { Text } from "react-native";const TestComponent = () => <Text>Test test</Text>;export...
View ArticleArgument of type '"openURL"' is not assignable to parameter of type 'never'...
I am beginner in Jest and these are classes defined.APIService class is not exported; only openURL function is defined.APIService.ts export const openURL = async (openURL : string) => { await...
View ArticleReact native with typescript passing useState as props
I have responsive.tsx file and I want to take an useState hook as props that contains orientation mode for app from app.tsx. I have an issue with types.Argument of type 'Dispatch<SetStateAction>'...
View ArticleCan I extend a component's constructor with additional arguments?
Consider a sample component:enum PET_TYPE { CAT = 'cat', DOG = 'dog', OTHER = 'other',}interface Props { type: PET_TYPE}function Pet(props: Props) { switch (props.type) { case PET_TYPE.CAT: return...
View ArticleHow to use useRef with Typescript/Formik?
I am passing a ref property into my custom FieldInput that I use for Formik validation of my form. However, it gives a few Typescript errors. For instance, in my function: const handleSubmitForm = (...
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Successfully uploaded image to Cloudinary from React Native does not return URL
I'm trying to upload image from React Native app to Cloudinary.The image appears on Dashboard, but I don't get secure_url.Here is my code: async uploadImage(photo: ImagePickerResponse, id: string):...
View ArticleOverriding method in typescript?
export class Person extends Component<...>{ getName(){ console.log('Person') } render(){ this.getName() } }export class Programmer extends Person{ getName(){ console.log('Programmer') }}Calling...
View ArticleReact Native Navigation Prop Not passing parameters correctly
In my React Native application, I have the following routes in my app.js set up:export default class App extends Component { render() { return (<NavigationContainer><Stack.Navigator...
View ArticleRender resolved or rejected value of Promise in ReactJS
So, I've got this function fetchData() that returns a promise which is either rejected or resolved. How can i Call fetchData and if promise resolves, render it on the page, Display loading text while...
View ArticleHow to access and change child's state from Parent component
You are given uncontrollable child component.Parent component stores number of counters and renders that amount of child components. It has two buttons Add counter and Increment all counters.You are...
View ArticleResolve promise after callback it's executed
I have the following code on which I am trying to block the execution of the method _saveAddress multiple time, so I made a promise for this method. const [pressEventDisabled, setPressEventDisabled] =...
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Cannot create a React Native + TypeScript app by following official directions
With the following context:$ node -vv14.8.0$ npm -v6.14.7$ yarn -v1.21.1$ tsc -vVersion 4.0.2and following the instructions here: https://reactnative.dev/docs/typescriptI tried to create a React...
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global.HermesInternal - Property 'HermesInternal' does not exist on type...
I have the code below, auto generated with:$ react-native init RepeatAloudApp.tsx/** * Sample React Native App * https://github.com/facebook/react-native * * @format * @flow strict-local */import React...
View ArticleHow to give array of spans bottom border at specific index? ReactJS
so what this does it checks the words that are inputted by user and compares to text array, how can i give bottom Border to a span which should be inputted next?return <span>{val}</span>
View ArticleFirebaseFirestore.Timestamp vs firebase.firestore.Timestamp on React Native...
I'm trying to solve an issue that seems like it should be an easy fix, but I can't find anything in the documentation about it, and there doesn't seem to be any questions regarding it.I'm building an...
View ArticleReact-Native custom Text component with Typescript : "Type \{\} is missing..."
I've been trying to implement the following custom Text component in React Native.import React from 'react';import { Text as RNText, TextStyle } from 'react-native';export interface TextProps {...
View ArticleWhat is the proper way to make navigation.goBack action to be processed...
Due to the nature of our app, it has some heavy data traffic over the bridge between native and javascript thread.To decrease this communication over the bridge and moving some js implementations to...
View ArticleCan I tell useMemo to skip null values in its dependency array?
I have a useMemo hook that wraps a component that only needs to re-render when its prop has certain shape (must not be null and must include a timestamp property).In the below example my layout prop...
View ArticleHow can I initialize a class instance in a stateless function component in...
Using a stateful pattern, I usually initialize a kind of helper class in my constructor and consume its methods in some component lifecycle methods like below:class StatefulComponent extends Component...
View ArticleProperty 'blur' does not exist on type 'Input'
I am using the useRef hook to pass a ref property into my custom FieldInput component. This is then used for the validation of my form.const fieldRef = useRef();... const handleSubmitForm = ( values:...
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