62
votes
16
answers
2.5K
views
Error: 'node-sass' version 5.0.0 is incompatible with ^4.0.0
I've created a blank React project, using the command: npx create-react-app on npm v7.0.7 and Node.js v15
54
votes
9
answers
1.1K
views
Pros/cons of using redux-saga with ES6 generators vs redux-thunk with ES2017 async/await
There is a lot of talk about the latest kid in redux town right now, redux-saga/redux-saga. It uses generator
59
votes
30
answers
2.4K
views
Hide keyboard in react-native
If I tap onto a textinput, I want to be able to tap somewhere else in order to dismiss the keyboard again (not
60
votes
7
answers
2K
views
ReactJS - Does render get called any time "setState" is called?
Does React re-render all components and sub components every time setState() is called? If so, why? I thought
57
votes
30
answers
2.2K
views
React - How to get parameter value from query string?
How can I define a route in my routes.jsx file to capture the __firebase_request_key parameter value from a UR
52
votes
10
answers
1.7K
views
What's the difference between "super()" and "super(props)" in React when using es6 classes?
When is it important to pass props to super(), and why? class MyComponent extends React.Component { constru
59
votes
30
answers
671
views
Perform debounce in React.js
How do you perform debounce in React.js? I want to debounce the handleOnChange. I tried with debounce(this.h
58
votes
30
answers
702
views
Detect click outside React component
I'm looking for a way to detect if a click event happened outside of a component, as described in this ar
57
votes
18
answers
2.3K
views
A component is changing an uncontrolled input of type text to be controlled error in ReactJS
Warning: A component is changing an uncontrolled input of type text to be controlled. Input elements should
55
votes
30
answers
1.7K
views
Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function but got: object
I am getting this error: Uncaught Error: Invariant Violation: Element type is invalid: expected a strin
58
votes
30
answers
3K
views
What is the difference between state and props in React?
I was watching a Pluralsight course on React and the instructor stated that props should not be changed. I&apo
60
votes
8
answers
586
views
What is the difference between using constructor vs getInitialState in React / React Native?
I've seen both used interchangeably. What are the main use cases for both? Are there advantages /
58
votes
30
answers
597
views
Show or hide element in React
I am messing around with React.js for the first time and cannot find a way to show or hide something on a page
62
votes
20
answers
2.7K
views
Call child method from parent
I have two components: Parent component Child component I was trying to call Child's method from Parent,
62
votes
13
answers
3K
views
How to get first N number of elements from an array
I am working with Javascript(ES6) /FaceBook react and trying to get the first 3 elements of an array that vari
56
votes
10
answers
2.8K
views
Difference between npx and npm?
I have just started learning React, and Facebook helps in simplifying the initial setup by providing the follo
59
votes
28
answers
2.9K
views
How to set focus on an input field after rendering?
What's the react way of setting focus on a particular text field after the component is rendered? Docume
59
votes
17
answers
2.2K
views
How do I conditionally add attributes to React components?
Is there a way to only add attributes to a React component if a certain condition is met? I'm supposed to
60
votes
30
answers
2.6K
views
React js onClick can't pass value to method
I want to read the onClick event value properties. But when I click on it, I see something like this on the co
68
votes
11
answers
819
views
Why do we need middleware for async flow in Redux?
According to the docs, "Without middleware, Redux store only supports synchronous data flow". I don't und
