67
votes
16
answers
1.2K
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React - changing an uncontrolled input
I have a simple react component with the form which I believe to have one controlled input: import React from
69
votes
18
answers
557
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How can I update the parent's state in React?
My structure looks as follows: Component 1 - |- Component 2 - - |- Component 4 - - - |- Component 5
57
votes
30
answers
2.6K
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How to add multiple classes to a ReactJS Component?
I am new to ReactJS and JSX and I am having a little problem with the code below. I am trying to add multipl
59
votes
14
answers
1.3K
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React JSX: selecting "selected" on selected <select> option
In a React component for a <select> menu, I need to set the selected attribute on the option that reflec
52
votes
16
answers
616
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Correct modification of state arrays in React.js
I want to add an element to the end of a state array, is this the correct way to do it? this.state.arrayvar.pu
63
votes
30
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2.3K
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How to update nested state properties in React
I'm trying to organize my state by using nested property like this: this.state = { someProperty: {
44
votes
16
answers
1.3K
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Parse Error: Adjacent JSX elements must be wrapped in an enclosing tag
I am trying to set up my React.js app so that it only renders if a variable I have set is true. The way my
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
60
votes
7
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2K
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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
59
votes
30
answers
680
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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
711
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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
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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
58
votes
30
answers
3K
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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
58
votes
30
answers
605
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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
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Call child method from parent
I have two components: Parent component Child component I was trying to call Child's method from Parent,
62
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13
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I am working with Javascript(ES6) /FaceBook react and trying to get the first 3 elements of an array that vari
56
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10
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2.8K
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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
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3K
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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
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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
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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
