REACTJS QUESTIONS

React antd Upload input required error with default list

help you fix your problem You should't use defaultFileList along with getFieldDecorator. Antd throws a warning about this

TAG : reactjs

Date : January 12 2021, 09:11 PM , By : Der Ketzer

How to display dynamically fetched image on client end in react?

I wish this help you There's a lot going on in your code. You've some problems with asynchronous calls and also not all functions are bound to this. I would suggest to convert your code to async/await to make it more readable and use named functions,

TAG : reactjs

Date : January 12 2021, 09:11 PM , By : picamiolo

React: TypeError: Cannot read property 'prototype' of undefined

help you fix your problem I am using react components and react-router-dom's Route, however importing {Route} from react-router-dom fails with error: - , Use your Route within Router.So, import the router:

TAG : reactjs

Date : January 12 2021, 09:11 PM , By : user184975

how can my call the action in my component using typescript with react redux?

around this issue You need to create Props and pass them to your component. This props should include getItms: Function. You are telling the component to render s children collection he doesn't know exist.You can do it like so:

TAG : reactjs

Date : January 12 2021, 07:00 PM , By : kuba53280

typescript mapDispatchToProps got error when import component require pass actions as props

this one helps. You should pass the action with same name as it is declared in the Props interface. So either try this -

TAG : reactjs

Date : January 12 2021, 07:00 PM , By : ganok_tor

Change state of buttons

may help you . I would split up the code between logic and presentation. As you already reused AddToList it's just a visual component and should not contain any logic.So I would move all logic to one component and then use the state to render the cor

TAG : reactjs

Date : January 12 2021, 07:00 PM , By : kdietz

React doesn't render my Component, only if I restart my project

I think the issue was by ths following , If you want the app to render the latest changes you made to the source files, you have to implement hot-reloading.Check this site for more info : https://gaearon.github.io/react-hot-loader/getstarted/

TAG : reactjs

Date : January 12 2021, 07:00 PM , By : mhedberg

Expandible TextInput to maximum number of lines in react-native

wish help you to fix your issue After some research, I have realised that this is a challenge of react on the Android side. I picked up component that can auto-scroll on android. You can clone the component here MultilineTextInput. Do some more styli

TAG : reactjs

Date : January 12 2021, 08:33 AM , By : DK.

ReactJS - load the data before rendering the component

wish helps you The way you are doing it, you could validate the response state object in your render method, and if it is null/empty, then return Loading.... When your state is then updated based on the response, the component will automagically re-r

TAG : reactjs

Date : January 12 2021, 08:33 AM , By : liquidx

Function(method) is executing twice although only being called once

will be helpful for those in need I created a sandbox project based on your code and it showed just once time.https://codesandbox.io/s/goofy-lamarr-5ejmv

TAG : reactjs

Date : January 12 2021, 01:40 AM , By : Neuromaster

How can I remove a item class from a child's item in css and react?

may help you . The easiest way to do this is to provide a new property like showArrowto NavbarLink. From your code snippets I think the showArrow can be set by item.terms. So you can do something like this:in NavbarItem

TAG : reactjs

Date : January 12 2021, 01:40 AM , By : Yolanda N. Ceron

React Devtools 4 DOM updates highlights

will be helpful for those in need Found this on twitter, the omission of Highlight Updates was deliberate.Reading the thread, it seems they are re-evaluating how to signal performance problems caused by re-renders. Till then, they are encouraging you

TAG : reactjs

Date : January 12 2021, 01:40 AM , By : pepper

I am having trouble adding data to my table on submit

will be helpful for those in need Well since in the parent component WorkOutList you send the function handleSubmit to the child component WorkoutAdder. You can access it from the properties rather than from the component instance itself. so:

TAG : reactjs

Date : January 12 2021, 01:40 AM , By : jbcrail

Axios post request is returning 401 unauthorised error

I wish this helpful for you for posting data with axios it is not needed to convert data to string, just send it away. The correct statement should be axios.post('http://10.42.0.108:8000/user/login/', values) instead of

TAG : reactjs

Date : January 11 2021, 05:14 PM , By : user178372

why is a React class component converted to functional component with hooks not picking up state in event handler on doc

may help you . The second parameter that you pass to useEffect tells react to skip the effect unless one of the items in the array has changed. You passed in an empty array, so other than the initial render, it will never update. Thus, you set up the

TAG : reactjs

Date : January 11 2021, 05:14 PM , By : cashshadow

How do I write a React Spring to change margin?

Hope this helps took me hours: you have to set the units of measurement on the from property even though it's zero!

TAG : reactjs

Date : January 11 2021, 05:14 PM , By : Tornike

React tab doesn't appear in chrome developer tools

wish helps you You can't see React tab because, Facebook have updated React DevTools to have Components and Profiler Tabs. ⚛️ Components tab serves same purpose as React tab in older versions. From description,

TAG : reactjs

Date : January 11 2021, 05:14 PM , By : Francesco

How to redirect to another component by setting up props from this component in react.js

it helps some times You have multiple options for this issue but I noticed you are using react-router-dom so you can do one of the following:

TAG : reactjs

Date : January 11 2021, 05:14 PM , By : Ryuken

Centre Buttons horizontally and vertically

this will help To align item in center with position: 'absolute' you have to add following style

TAG : reactjs

Date : January 11 2021, 03:34 PM , By : user105769

Customize Reactive Search DateRange

this one helps. Sorry for the delay in responding. DateRange internally uses DayPickerInput from react-day-picker and Date Component have a prop called dayPickerInputProps you can directly use it to send props directly to the internal component. To f

TAG : reactjs

Date : January 11 2021, 03:34 PM , By : Moe Skeeto

Anyone know why my Component Keeps Remounting?

To fix this issue Had to Move My button with all the logic to a different component as the answer above stated

TAG : reactjs

Date : January 11 2021, 03:34 PM , By : Randoa

How to get the latest state value after using setState?

Does that help Your code is needlessly complex. From what I understand, you want to toggle the open property to be either true or false depending on a button click. And you want your tooltip's visibility to be tied to this state.Below is a simple exa

TAG : reactjs

Date : January 11 2021, 03:32 PM , By : Jonathan Bernard

How to return value in component react typescript

Any of those help You're missing the brackets to destructure that property from the object of properties, so currently you are using an object in your boolean comparison.

TAG : reactjs

Date : January 11 2021, 03:32 PM , By : baylisscg

RadioButton click TypeError: Cannot read property 'setState' of undefined

wish helps you You have two options here. Either use arrow function or bind your function to this inside your constructor. Why is it not working?

TAG : reactjs

Date : January 11 2021, 03:32 PM , By : jan

How should useDispatch be used to enforce type checking?

should help you out I'm confused about the benefits of and best practices for using useDispatch. , You could create a typed custom hooks:

TAG : reactjs

Date : January 11 2021, 03:28 PM , By : ravibits

Property 'title' does not exist on type 'IntrinsicAttributes & IProps'

hop of those help? You are not accessing the prop on the actual props object. You'd want to use props.isDisplayedLoadingTitle . Or you could destructure it from the props object by replacing (props: IProps) with ({ isDisplayedLoadingTitle}: IProps) a

TAG : reactjs

Date : January 11 2021, 03:28 PM , By : Thaweesak Suksuwan

What are the disadvantages of client-only routes?

seems to work fine I can come up with two disadvantages that are really just other ways to protect private routes: Server computation Supplying user specific data Gatsby does not render dynamically on the server

TAG : reactjs

Date : January 11 2021, 03:28 PM , By : Cosmin

Dropping files or opening files from the file selector dialog box causes the React component to unmount

this one helps. The cleanup callback for an effect hook is called when any of the dependencies change, as well as on unmount. (The dependencies are the array passed as the second parameter to useEffect.) So in this case, the component probably isn't

TAG : reactjs

Date : January 11 2021, 03:26 PM , By : Willem van Schevikho

How to check if a component has been clicked after an onblur event in React

help you fix your problem The best solution is to use the 2nd parameter in the onBlur synthetic event to find out what element GAINED focus. There's a pretty good write up on it here.

TAG : reactjs

Date : January 11 2021, 03:26 PM , By : Stephen Judge

What should be considered as component in React

I wish this helpful for you Flexibility. If you particularly style your button one way and it takes a lot of copy-paste to use it elsewhere, why not make it a component and just call it.

TAG : reactjs

Date : January 11 2021, 03:26 PM , By : FriendL

Updating Parents state from Child without triggering a rerender of Child in React

will help you Two problems here. First, React will by default re render all child components when the parent gets updated. To avoid this behavior you should explicitly define when a component should update. In class based components PureComponent or

TAG : reactjs

Date : January 11 2021, 03:26 PM , By : Ansari

Select component is ignoring parent onClick event

wish help you to fix your issue Problem: , I need some guidance in the priorities of the events

TAG : reactjs

Date : January 11 2021, 02:18 PM , By : ChrisMe

How to add Condition inside render method in reactjs

I think the issue was by ths following , I am using the following component to create a drop down. But if drop down has one value and d.datasetid is equal to 0 then that value should not come in drop down which means drop down should populate with bl

TAG : reactjs

Date : January 11 2021, 02:18 PM , By : Alan Little

How to fix form that will not allow text to be entered?

it helps some times Background , You may need to define a name property on the input

TAG : reactjs

Date : January 11 2021, 02:18 PM , By : Val

Cannot read property 'name' of undefined on React with my props

around this issue This isn't working as you expect because the prop you're looking for hasn't been populated yet. It's loading the page and then on componentDidMount it's sending a callback to the parent element to gather additional information and s

TAG : reactjs

Date : January 11 2021, 02:18 PM , By : JulianCT

Material UI tooltip doesn't display on custom component, despite spreading props to that component

Does that help Your Tooltip is not working properly because the child of a Material-UI Tooltip must be able to hold a ref.The following can hold a ref:

TAG : reactjs

Date : January 11 2021, 02:18 PM , By : user152319

Unexpected output but expected view when using hooks React for toggle

I wish this helpful for you You misunderstand the useState hookThe first value in the array (here showEdit) is the value, which is stored in the state.

TAG : reactjs

Date : January 10 2021, 02:04 PM , By : vitorcoliveira

Determine if two objects have an identical structure with Jest

it should still fix some issue You can achieve what you want by implementing a custom matcher. The matchers jest has can be extended by using the extend method.As a proof of concept, you can define a toMatchStructure matcher like this:

TAG : reactjs

Date : January 10 2021, 02:04 PM , By : cthulhup

Material ui - snackbox aria label not being read

around this issue After trying everything I could think of, I realised that it was because I had not defined a 'role' which the aria-label needs, simply adding the following got it working:

TAG : reactjs

Date : January 10 2021, 02:04 PM , By : Chris Lomax

Why is useState hook calling initialising value code twice?

should help you out It's a JavaScript technicality. There's nothing React can do to prevent generateInitialObj from being called on every single render. To account for this, React supports the following API instead:

TAG : reactjs

Date : January 10 2021, 02:04 PM , By : user157064

React - override state by exists object properties

may help you . I have state with properties initialized with empty string, because im putting these into form inputs. Additionaly I get object from Firebase with properties matching with state but not every one exists. I would set state properties by

TAG : reactjs

Date : January 10 2021, 02:04 PM , By : Angelo Giannatos

how to stop re-rendering of list items in context consumer when state changes

help you fix your problem You can extend React.PureComponent if your Item component props are all serializable or you extends React.Component and implement shouldComponentUpdate.Option 1.

TAG : reactjs

Date : January 09 2021, 02:14 PM , By : iyogee

how to pass props one page to another page via react router?

This might help you Use redux to pass data for complex application. But if you want to stick around using react only then you could pass data using props to Redirect Component.

TAG : reactjs

Date : January 09 2021, 02:14 PM , By : JoeCh

How to display react numerical props only if they pass from the container?

fixed the issue. Will look into that further The term you're looking for is Conditional Rendering and the standard way to render a component when the prop is defined is by using the operator.{bestScore Best: {bestScore}}

TAG : reactjs

Date : January 09 2021, 02:14 PM , By : Anonymous

Input in another component, error with target

This might help you Want to simplify my component, and want the search bar in another component to be more easy to read the code. And I have problems with target. I'm new in React... , You haven't passed the event to your handleUserInput function.

TAG : reactjs

Date : January 09 2021, 05:38 AM , By : user183275

What is the difference between props and children in Gatsby?

should help you out Props and children are not the same thing. They accomplish different things. Here is an example:

TAG : reactjs

Date : January 09 2021, 05:38 AM , By : cautionsign

Validating conditional pairs of props with Typescript

seems to work fine I'm struggling to understand how to validate that two props either exist or don't. , You can do something like this

TAG : reactjs

Date : January 09 2021, 05:38 AM , By : AJacques

React-Dropzone how convert each file to base64

I hope this helps . check this out,you can get files and then you can store them into images array of state instance.

TAG : reactjs

Date : January 08 2021, 10:52 AM , By : Mostapen

How to change the return of a function to int?

like below fixes the issue When you click Next/Previous button. You pass a function this.decrementPage or this. incrementPage to updatePage function.

TAG : reactjs

Date : January 08 2021, 10:52 AM , By : user169463

Import only grid system from bootstrap to react

I wish this helpful for you The simplest way is to reference the grid only CSS from the React public/index.html

TAG : reactjs

Date : January 08 2021, 10:52 AM , By : Eric

TypeScript Type for function arguments not erroring?

it fixes the issue Because the function you've implemented can, in-fact, accept foo as a property of the object parameter.The following is valid with your function:

TAG : reactjs

Date : January 08 2021, 10:52 AM , By : DotNetWise

Unexpected user of comma operator no-sequences

like below fixes the issue I'm learning react and I'm trying to do a call back function to keep my states in sync. I've done the below code which does work and keeps it in sync but I get the , You are trying to set amount value. You can simply do thi

TAG : reactjs

Date : January 08 2021, 03:18 AM , By : harley.holt

React Native onChangeText like onChange in ReactJS

To fix the issue you can do I learn in the same time ReactJS and React Native. I saw in an udemy tutorial something very beautiful, that the professor putt it just one onChange method, for all inputs and taking advantage of the "name" attribute, he c

TAG : reactjs

Date : January 08 2021, 03:18 AM , By : Roel van Dijk

How to dynamically render an element on clicking a button

help you fix your problem I got solution like this. use a state(say x) along with the component in {x component} and initially set state to false, and on button click set the state x to true your component will be rendered

TAG : reactjs

Date : January 08 2021, 03:18 AM , By : Gabe

Cannot import components from react-bootstrap

help you fix your problem When you import something wrapped around with {}, it refers to something that is exported with an explicit name identifier.In this case: import {Button} from 'react-bootstrap/Button' would mean that file has explicitly named

TAG : reactjs

Date : January 07 2021, 03:08 PM , By : Hadley

How to prevent Office UI Fabric React DatePicker flyout from stealing focus when allowTextInput is true?

may help you . When using the DatePicker from Office UI Fabric React , If you still didn't solve the issue, try to set:

TAG : reactjs

Date : January 07 2021, 03:08 PM , By : rhyhann

How delete item from redux state?

To fix the issue you can do Considering that your state is an array of objects, one solution would be to eliminate the selected item by their index. You should also avoid doing direct state-mutations, in redux as this will lead to side-effects. Alway

TAG : reactjs

Date : January 07 2021, 03:08 PM , By : Malikul

Uncaught TypeError: map is not a function In Reactjs with Firebase

To fix the issue you can do I have solve my problem by using @Vaibhav example please check under given Code

TAG : reactjs

Date : January 07 2021, 03:08 PM , By : user185939

Alternative to componentWillReceiveProps for my particular use case

it helps some times You can perhaps add an additional field to Redux Store which would convey information that a new action from user happened, such as timestamp of clicking the search button, or a UUID, and then compare in componentDidUpdate with th

TAG : reactjs

Date : January 07 2021, 07:50 AM , By : Sebastián Ucedo

Pokemon, API call Variable doesn't save

I hope this helps . I am trying to make a program that will just display a certain pokemons name and get a picture using Pokeapi. But it appears that after my pokeURL variable is out of the $.getJSON function, it resets itself back to null. , Try thi

TAG : reactjs

Date : January 07 2021, 07:50 AM , By : ChristianM