News Articles react-component

Is there an other effective way to pass object as props through react components?

its my App.js file import React from "react"; import Header from "./components/header/Header"; const App = () => { const data = { welcome: "Welcome to 30 Days Of React", title: "Getting Started React", subtitle: "JavaScript Library", author: { firstName: "Asabeneh", lastName: "Yetayeh", }, date: new Date(), }; return ( <div className="app"> <Header data={data} /> </div> […]

Why doesn’t go my props to child component when I changed my props in Main Component?

When I change my state, I can read newData in Main Component but my update state doesn’t go my ChildComponent. I read only initialData in my ChildComponent. Why doesn’t go my new props to ChildComponent? or Why doesn’t reRender my ChildComponent ? class Main extends Component{ constructor(props) { super(props); this.state = { data: "initalData", } […]

Why doesn’t go my props to child component when I changed my props in Main Component?

When I change my state, I can read newData in Main Component but my update state doesn’t go my ChildComponent. I read only initialData in my ChildComponent. Why doesn’t go my new props to ChildComponent? or Why doesn’t reRender my ChildComponent ? class Main extends Component{ constructor(props) { super(props); this.state = { data: "initalData", } […]

Why doesn’t go my props to child component when I changed my props in Main Component?

When I change my state, I can read newData in Main Component but my update state doesn’t go my ChildComponent. I read only initialData in my ChildComponent. Why doesn’t go my new props to ChildComponent? or Why doesn’t reRender my ChildComponent ? class Main extends Component{ constructor(props) { super(props); this.state = { data: "initalData", } […]

i don’t know why i get this error in my console even if my site is just working fine, "Warning: Encountered two children with the same key"

I am using React function based component and this is a app in which i add an api to fetch News and display inside my site. Everything is working fine, but this error "Warning: Encountered two children with the same key" in console is so annoying. Please Help me to get rid of this problem. […]

How to change the style of just one item in a flatList using hooks and functional components

I am trying to implement a simple flalist using hooks and functional components. I want the item clicked to get highlighted and if there was another item already highlighted I want it to be de-highlighted. Im getting a dumy data with the first item as already selected from an array of objects as const CategoriesData […]

Get displayName from signup component through firebase, on to header component on react

Here is my signup component import React, { useRef, useState } from ‘react’; import ‘./SignUp.css’ import { Link, useHistory } from “react-router-dom” import { auth } from “./firebase”; function SignUp() { const history = useHistory(); const [email, setEmail] = useState(”); const [password, setPassword] = useState(”); const [displayName, setDisplayName] = useState(”); const [address, setAddress] = useState(”); […]

How to mock react component for only one test with jest

I need to mock component only for one test. So I require actual component for every test but in a specific I’m trying to return mocked value. But in such way I’m getting TypeError: specificMockImpl.apply is not a function. How can I fix this? import { render } from ‘@testing-library/react’; import App from ‘./App’; import […]

How to mock react component for only one test with jest

I need to mock component only for one test. So I require actual component for every test but in a specific I’m trying to return mocked value. But in such way I’m getting TypeError: specificMockImpl.apply is not a function. How can I fix this? import { render } from ‘@testing-library/react’; import App from ‘./App’; import […]

How to mock react component for only one test with jest

I need to mock component only for one test. So I require actual component for every test but in a specific I’m trying to return mocked value. But in such way I’m getting TypeError: specificMockImpl.apply is not a function. How can I fix this? import { render } from ‘@testing-library/react’; import App from ‘./App’; import […]

How to mock react component for only one test with jest

I need to mock component only for one test. So I require actual component for every test but in a specific I’m trying to return mocked value. But in such way I’m getting TypeError: specificMockImpl.apply is not a function. How can I fix this? import { render } from ‘@testing-library/react’; import App from ‘./App’; import […]

How to mock react component for only one test with jest

I need to mock component only for one test. So I require actual component for every test but in a specific I’m trying to return mocked value. But in such way I’m getting TypeError: specificMockImpl.apply is not a function. How can I fix this? import { render } from ‘@testing-library/react’; import App from ‘./App’; import […]

How to mock react component for only one test with jest

I need to mock component only for one test. So I require actual component for every test but in a specific I’m trying to return mocked value. But in such way I’m getting TypeError: specificMockImpl.apply is not a function. How can I fix this? import { render } from ‘@testing-library/react’; import App from ‘./App’; import […]

Check the render method of `InputOption`

Trying to render the component but getting an error message. The below code runs correctly function InputOption(Icon, title, color) { return( <div className=’inputOption’> </div> ) } export default InputOption As soon as I start calling the props it flags an error. function InputOption(Icon, title, color) { return( <div className=’inputOption’> <Icon style={{color : color}}/> </div> ) […]

React functional (hooks) component in parent class component

I have a quite big React component SearchProvider written as a class and a UI component InputRange that I wrote as functional component using Hooks. ATM I am getting the error "Invalid hook call. Hooks can only be called inside of the body of a function component." Can I use the hook component as a […]

How to have a reference to a tree node with current item

Here I have a tree select that I have implement using antd 3.x and now I’m trying to migrate rc-tree. So I rendered my tree using a list with the type of TreeNodeType[] type as follow type.ts export interface TreeItem { compositeKey: string; title?: string; totalLeafs?: number; level: number; totalChildren?: number; } export interface TreeNodeType […]

How to set state of an Array of objects using useState?

I’m building a movies app in React and I’m using TMDB’s api for that. I’m completely new to functional components and have a few queries. First I fetch all the genres using an api, and then iterate the genres one by one and call another API for fetching 20 movies in that genre. The final […]

How to set state of an Array of objects using useState?

I’m building a movies app in React and I’m using TMDB’s api for that. I’m completely new to functional components and have a few queries. First I fetch all the genres using an api, and then iterate the genres one by one and call another API for fetching 20 movies in that genre. The final […]

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Creator of @LzoMedia I am a backend software developer based in London who likes beautiful code and has an adherence to standards & love's open-source.