Questions tagged [reactjs]
React is a JavaScript library for building user interfaces. It uses a declarative, component-based paradigm and aims to be efficient and flexible.
reactjs
481,152
questions
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Error message "error:0308010C:digital envelope routines::unsupported"
I created the default IntelliJ IDEA React project and got this:
Error: error:0308010C:digital envelope routines::unsupported
at new Hash (node:internal/crypto/hash:67:19)
at Object.createHash (...
- 24.3k
2335
votes
49
answers
1.7m
views
How to programmatically navigate using React Router?
With react-router I can use the Link element to create links which are natively handled by react router.
I see internally it calls this.context.transitionTo(...).
I want to do a navigation. Not ...
- 121k
2054
votes
85
answers
2.1m
views
Loop inside React JSX
I'm trying to do something like the following in React JSX (where ObjectRow is a separate component):
<tbody>
for (var i=0; i < numrows; i++) {
<ObjectRow/>
}
</...
- 41.7k
1478
votes
27
answers
653k
views
What are these three dots in React doing?
What does the ... do in this React (using JSX) code and what is it called?
<Modal {...this.props} title='Modal heading' animation={false}>
- 15.1k
1447
votes
32
answers
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How to pass props to {this.props.children}
I'm trying to find the proper way to define some components which could be used in a generic way:
<Parent>
<Child value="1">
<Child value="2">
</Parent>
There is a logic ...
- 46.3k
1278
votes
63
answers
871k
views
React-router URLs don't work when refreshing or writing manually
I'm using React-router and it works fine while I'm clicking on link buttons, but when I refresh my webpage it does not load what I want.
For instance, I am in localhost/joblist and everything is fine ...
- 13.1k
1124
votes
8
answers
282k
views
Why use Redux over Facebook Flux? [closed]
I've read this answer, reducing boilerplate, looked at few GitHub examples and even tried redux a little bit (todo apps).
As I understand, official redux doc motivations provide pros comparing to ...
- 45.5k
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votes
23
answers
1.6m
views
Can you force a React component to rerender without calling setState?
I have an external (to the component), observable object that I want to listen for changes on. When the object is updated it emits change events, and then I want to rerender the component when any ...
- 30.2k
1066
votes
31
answers
1.3m
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Understanding unique keys for array children in React.js
I'm building a React component that accepts a JSON data source and creates a sortable table.
Each of the dynamic data rows has a unique key assigned to it but I'm still getting an error of:
Each ...
- 61.8k
1063
votes
30
answers
739k
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 add required and readOnly attributes to form elements based on an Ajax call after render, but ...
- 12.7k
1044
votes
16
answers
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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 following ready-made project.
If I have to install the skeleton project I have to type npx ...
- 10.6k
972
votes
28
answers
1.1m
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?
Documentation seems to suggest using refs, e.g:
Set ref="nameInput" on my input field in the render ...
- 11.7k
949
votes
23
answers
853k
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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, I tried this way but couldn't get a result:
class Parent extends Component {
render() {
...
- 9,830
925
votes
45
answers
425k
views
What is the difference between React Native and React?
I have started to learn React out of curiosity and wanted to know the difference between React and React Native - though could not find a satisfactory answer using Google. React and React Native seems ...
- 11.4k
917
votes
57
answers
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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 article. jQuery closest() is used to see if the target from a click event has the dom element as ...
- 22.9k