Questions tagged [react-class-based-component]
230 questions
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passing an element's[Shopping items] to the modal is not working
So, I have been trying to pass the following information my my pop-up modal. I am using react-modal. The indecies of each element or each product is showing correctly. when I console.log(index) for each item the correct index appears.
The problem…
Emad
- 3
- 3
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3 answers
How to change class of a div onclick in React
This is my code:
render() {
return (
);
}
When I click the button I want the class of the div to change from .btn.div to .btn divhidden, which…
Maxator
- 53
- 1
- 7
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Expo React Native: undefined is not an object (evaluating 'this.context.state')
I am with undefined is not an object (evaluating 'this.context.state') error at my React Native application using Expo.
context/index.js
import React, { Component } from "react";
const MyContext = React.createContext();
class MyProvider extends…
Bruno Miguel Groth
- 138
- 7
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1 answer
Not able to set state in class component , Uncaught TypeError: Cannot read properties of undefined (reading 'setState')
while using react classcomponent , I am not able to set the states in the states section,I am trying to set a number and an array from API, I am not able to set both , the number is also showing undefined.
There is no error in the api as well, if I…
Tanvesh
- 127
- 1
- 10
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How can we implement filter function in a country map in a superset
I am new in react js and I am learning superset and can add filters in the pie chart, and table but I don't know why I can't add filters on the country if you have any documentation or source code please help me out. I also have good knowledge of…
Shiva Giri
- 105
- 1
- 6
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0 answers
i need a package.json file for a project that works with react, graphql and apollo-client
hi i have a problem with a task that required from me that i should do a simple store with 3 pages that uses graphql and apollo client with react but with class components not functional and hooks so if anyone can help me with that because i can't…
mohamed bediwe
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- 1
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React class component api call in componentDidMount() called twice
New to React here,
I'm building a class component with Typescript. I need to fetch data from the server when component displays. componentDidMount() seems to be the right place to do that; but it is always called twice.
I found its because of the…
danbord
- 3,605
- 3
- 33
- 49
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2 answers
Is `this.props` possible to be changed in the component itself?
As the title says, is this.props possible to be changed in the component itself whether manually or automatically
manual change example
this.props.someData = 'some value'
I don't know how to change this.props automatically, so I can't write example…
wychoi
- 37
- 5
0
votes
1 answer
How can I split a custom data table up into modular components?
i'm looking for some guidance to what would be considered best practice when developing a custom data table.
Background: I've been tasked with created a table component that has both static and asynchronous loading for when the user paginates,…
stacker
- 233
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- 5
- 14
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1 answer
What is the difference between rcc and rfc in react?
I want a use case example of when react class components are needed for a project over a react functional component and vise versa. I cant seem to understand the difference between the two.
ROSBY ASIAMAH
- 5
- 1
0
votes
0 answers
Save default input value React class
I am trying to pass the state of the name value in my object as a default to one of my input fields but anytime i try to save i get a type error , undefined uuid. you can find the sample of my code below and images of the error. I want the value of…
Lanlokun
- 1
- 1
0
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0 answers
Displaying data from localStorage in ReactJs
I have a dropdown menu where I can select multiple items. And everytime I choose an item from the dropdown, it is being saved in the localStorage. Upon reloading the browser, I want the selected item to still display in the dropdown selection, since…
0
votes
1 answer
Converting DraftJS class component to Functional component
The following Draftjs code is in class component. The plugins like CreateImage, Focus Plugin, and BlockDndPlugin are being imported from the DraftJS. I would be grateful if somebody can convert the class-based react components into Functional based…
Huzaifa Khalid
- 1
- 1
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votes
1 answer
Redux doesn't work in React Native - class component
this view doesn't work with redux, i need use redux dispatch inside react class component, but i get error
"Invalid hook call. Hooks can only be called inside of the body of a
function component. This could happen for one of the…
Cristian Romero
- 55
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- 9
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votes
1 answer
Array map method is not showing list in Class Based Component in React
I have Parent component FoodBox.js and it's child component FoodItems.js. I'm trying make a list of food items stored in the parent comp. and using map() method for it but
- is showing empty.
Here is FoodBox.js
const FOOD_ITEMS = [
{ id: "01",…
Mohit
- 135
- 10