How to return a promise in redux actions - react native
I am trying to get location from redux when needed. After redux save the location to the state i need to return a promise since i need that data in my screen. here are my actions, reducers, store, and...
View Article" is declared but its value never read" and "Cannot find name " at same time
I am using React and Typescript and react-router - I want to use RouteComponentProps to bind this.props.history automatically. This is my code:import * as React from "react"; import { connect } from...
View ArticleExtending generic props in react native
Sorry if the heading is misleading. I can't seem to find a suitable title. I have a two classes.****************Form.tsx interface Props{} interface State{} class Form extends Component<Props,...
View ArticlegetParam errors about Argument of type X is not assignable to parameter of...
I've been trying to get react-navigation to play nice with typescript, but I'm having a hard time with all the warnings.I tried looking into the types api but I can't really find what I'm supposed to...
View ArticleStream of values with react hooks
I have value X coming from the server. I would like to expose an interface similar tointerface Xclient { getX(): Promise<X> } that I will later use from my react function component.I say similar...
View ArticleHow do you set the Typescript type for useRef hook in React Native?
How do I correctly type the useRef for a React Native TextInput? With the below code I get the following error.Property 'isFocused' does not exist on type 'MutableRefObject<TextInput>'import...
View ArticleCreating a simple unit converter using text input , react hooks and typescript
I want the converter to show results at real time for each input text field . Strictly need to use the react hooks and typescript for my react-native app function GradConverter(){ const [temp,...
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React Native - Invariant Violation on ToolbarAndroid
I tried using ToolbarAndroid component but I always get this error messageimport { View, StyleSheet, Image, TouchableOpacity, ToolbarAndroid } from 'react-native'; public render() { return (...
View ArticleHow to verify that navigation has been called or not in react native testing?
Here is my code component.tsxexport function myComponent(navigation: Navigation) { // some logic... return ( <TouchableWithoutFeedback testID="notificationCard" onPress={() =>...
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 ArticleHow to Create New React Native Components Library With Existing Code?
We have a huge React Native(60.5) project with typescript that also includes React Native Web. Because of this reason, we also have lots of reusable components which we use them in screens.Developers...
View ArticleYouTube API get video url is missing url_encoded_fmt_stream_map and undefined
Restful Infourl: https://www.youtube.com/get_video_info?video_id=${videoId}&el=embedded&ps=default&eurl=&gl=US&hl=en method: 'GET', headers: { 'Content-Type': 'text/plain' }...
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Typescript Class Variable Not Updating / Retaining Value
I am trying to create a class that will fetch / cache users from my Firestore database. For some reason, I can't seem to save or expose the previous promise that was created. Here is my class:export...
View ArticleError in jest test: TypeError: Cannot read property 'container' of undefined
I'm trying to test a typescript react-native class using jest but the test is not passing.This is the class:import * as React from "react"; import { Image, KeyboardAvoidingView, StyleSheet, View } from...
View ArticleUse undefined instead of null in RealmJS
I am wondering if there is a way to force RealmJS return undefined instead of null on optional fields?I am asking this, because typescript's optional types is actually T | undefined, not T | null. I...
View ArticleHow to bind values to dynamic controls in react
I am loading form controls dynamically by making 2 api calls. First api to get form control's list and second api to get data for the controls loaded previously. First half works fine and i am able to...
View ArticleCannot use `ts-node` to run script on expo (react-native)
noob here.I have some ReactJs project which is run perfectly on every aspect. But recently I want to make it monorepo and I chose Expo for this job.I can make most of code works except some custom...
View ArticleHow to import module like 'MyOwnLibrary/data'
I'm working on a two-package project using Typescript & React-Native:PackageA(which is leaf package) contains a REST client and mocks MyOwnLibrary - src -tests _mocks_ -restClientMock.ts...
View ArticleReact Native SectionList: What are the correct TypeScript types
I'm building a React Native app using TypeScript. I'm trying to use a SectionList. I followed the docs, and here is my code: renderSectionHeader = ({ section: { title } }: { section: { title: string }...
View Articlehow to solve Property 'navigation' does not exist on type 'Readonly&
I have the following two pieces of code:CustomHeader.tsximport { View, StyleSheet, Button } from 'react-native'; import { NavigationScreenProps } from 'react-navigation'; import Icon from...
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