Recent questions tagged ReactJs

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reactjs - How do I create configuration for axios for default request headers in every http call?

https://github.com/MrFiniOrg/AxiosQuestion I would like to have my project setup so that I do not have to ... in the app.js class component See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - How to test a react component that is dependent on useContext hook?

I have a component that uses useContext and then its output is dependent on the value in the context. A ... change the value of NameContext? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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718 views

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reactjs - Navigating Programmatically in React-Router v4

I couldn't wait and I jumped into using the latest alpha version of react-router v4. The all-new < ... use it to navigate programmatically? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - How to parse query string in react-router v4

In react-router v3 I could access it with props.location.query.foo (if the current location was ?foo=bar) In ... artist which is the value band) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - Multiple params with React Router

I use React 15.0.2 and React Router 2.4.0. I want to pass multiple params to my route and I'm not ... " component={ManageTaskPage} /> </Route> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - React propTypes: objectOf vs shape?

What's the difference between PropTypes.objectOf and PropTypes.shape? In the PropTypes: // An object with property ... when should I use shape? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - How to connect Threejs to React?

I work with React and use a canvas. I want to change the canvas to WebGL (Threejs library). How to connect this ... <div ref="threejs"></div> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - Next.js: Reduce data fetching and share data between pages

I'm looking for solutions for better data fetching in a Next.js app. In this question I'm not just looking ... I'm a missing something obvious? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - react evironment variables .env return undefined

I am building a react app and i need to fetch data from my api, now i want to store the api url as an ... div> ); } } export default App; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - How to bundle a React app to a subdirectory on a server?

I have a React app I've been developing on my localhost. I want to copy it to a server into a subdirectory ... here in case that helps. Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - React PropTypes: Allow different types of PropTypes for one prop

I have a component that receives a prop for its size. The prop can be either a string or a number ex: " ... = { size: React.PropTypes } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - Setting state on componentDidMount()

I know that it is an anti-pattern to set state on componentDidMount and a state should be set on ... set the state on componentDidMount? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - How to render react components by using map and join?

I have one component which is going to display Array of String. The code looks like this: React.createClass({ ... be rendered. Any suggestion? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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700 views

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reactjs - How to enable file upload on React's Material UI simple input?

I am creating a simple form to upload file using electron-react-boilerplate with redux form & material ui. The ... on how to achieve this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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630 views

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reactjs - Passing object as props to jsx

I have an object contains multiple common key-value props, that I want to pass on to some jsx. Something like ... .myProp2}/> Is this possible? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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659 views

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reactjs - How to generate unique IDs for form labels in React?

I have form elements with labels and I want to have unique IDs to link labels to elements with htmlFor attribute. ... way to do it now? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - React-Redux and Websockets with socket.io

I'm new with that technology React-Redux and I would like your help with some implementation. I want to ... is it a better implementation? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - How do you test for the non-existence of an element using jest and react-testing-library?

I have a component library that I'm writing unit tests for using Jest and react-testing-library. Based on ... jest using react-testing-library? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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553 views

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reactjs - How to disable a button when an input is empty?

I'm new to React. I'm trying to disable a button when an input field is empty. What is the best approach ... data from one element to another. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - Is it possible to return empty in react render function?

I have a notification component, and I have a timeout setting for it. After timeout I call this.setState({ ... / here has some syntax error See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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672 views

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reactjs - conditional rendering in styled components

How can I use conditional rendering in styled-components to set my button class to active using styled-components in React? ... > </div> ) }} See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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820 views

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reactjs - How to set build .env variables when running create-react-app build script?

I'm using the following environment variable in my create-react-app: console.log(process.env.REACT_APP_API_URL) // ... react-scripts eject" } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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813 views

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reactjs - Re-render React component when prop changes

I'm trying to separate a presentational component from a container component. I have a SitesTable ... (mapStateToProps)(SitesTableContainer); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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456 views

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reactjs - Writing embeddable Javascript plugin with React & Webpack

I want to be able to bundle my React app with Webpack such that distributed copies put onto a CDN can be sourced ... fix it. Thanks in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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702 views

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reactjs - What is the difference between redux-thunk and redux-promise?

As far as I know and correct me if I am wrong, redux-thunk is a middleware which helps us dispatch async ... to redux-thunk would be enough? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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624 views

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reactjs - What does ...rest mean in React JSX?

Looking at this React Router Dom v4 example https://reacttraining.com/react-router/web/example/auth-workflow I see ... function Am I right? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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500 views

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reactjs - React Redux Cant add item into list in the state

The initialState for the list is works perfectly, and i can found the console log in the reducre too . However its ... :{ return state } } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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635 views

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reactjs - how does this fix the state closure problem with react hooks?

I am looking at the code in formik that apparently is a way around the stale closure problem with react hooks. ... Does it silence the linter? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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