Recent questions tagged ReactJS

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reactjs - Could not proxy request /pusher/auth from localhost:3000 to http://localhost:5000 (ECONNREFUSED)

I am trying to create a chat app using reactJS and pusher, i am getting this error- Could not proxy request / ... be correct. Can anybody help? 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 - Differences between creating a new class to using export const

Setup: BabelJS (es2015, react, stage-1) Webpack React / redux New to CommonJS and ES6. I know the ... and would appreciate your input. 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 I restrict the type of React Children in TypeScript, using the newly added support in TypeScript 2.3?

I'm trying to take advantage of the recently added support for typing of children in the TypeScript compiler ... of the children components. 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 - Redux: Why is avoiding mutations such a fundamental part of using it?

I'm new to Redux - and I'm really trying to get the big picture of using functional programming to make ... the old state at each step? 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 - When specified, "proxy" in package.json must be a string

I would like to have proxy in my react client, my package.json contains: ... "scripts": { "start": "react- ... Google</a> </header> </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 - Axios having CORS issue

I added proxy in package.json and it worked great, but after npm run build the CORS issue has resurfaced again ... limited to client side only. 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 react hooks determine the component that they are for?

I noticed that when I was using react hooks, a child component's state change does not rerender a ... , ReactCurrentOwner, react-reconciler. 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 - Use custom build output folder when using create-react-app

Facebook provides a create-react-app command to build react apps. When we run npm run build, we see output in ... /build for the output? 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 - how to cancel/abort ajax request in axios

I use axios for ajax requests and reactJS + flux for render UI. In my app there is third side timeline ( ... to cancel/abort requests in axios? 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 use Google fonts in React.js?

I had built a website with React.js and webpack. I want to use Google fonts in the webpage, so I put the ... . How can I solve this problem? 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 I pass state through React_router?

Here is the file that's causing me trouble: var Routers = React.createClass({ getInitialState: function(){ return{ ... I hope this helps! :) 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 Hook "useState" is called in function "app" which is neither a React function component or a custom React Hook function

I'm trying to use react hooks for a simple problem const [personState,setPersonState] = useState({ DefinedObject } ... }; export default person; 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 - Class extends React.Component can't use getInitialState in React

I'm tring the ES6 syntax in React, and write the components like: export default class Loginform extends React. ... don't understand it well. 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 tell webpack dev server to serve index.html for any route

React router allows react apps to handle /arbitrary/route. In order this to work, I need my server to send the ... me my react app. please. 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 use switch statement inside a React component?

I have a React component, and inside the render method of the component I have something like this: render() { ... how to achieve what I want? See Question&Answers more detail:os...

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

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495 views

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reactjs - How can I set a cookie in react?

Orginally, I use the following ajax to set cookie. function setCookieAjax(){ $.ajax({ url: `${Web_Servlet}/ ... the cookie's session time? See Question&Answers more detail:os...

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

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716 views

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reactjs - What is withRouter for in react-router-dom?

I've sometimes seen people wrap their components in withRouter when they are exporting them: import { withRouter } ... when should I use it? See Question&Answers more detail:os...

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

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583 views

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reactjs - What does it mean when they say React is XSS protected?

I read this on the React tutorial. What does this mean? React is safe. We are not generating HTML strings so ... ? How is this safety achieved? 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 - Attach Authorization header for all axios requests

I have a react/redux application that fetches a token from an api server. After the user authenticates I'd ... are much appreciated, 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 - 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 / disadvantages? Is one a better practice? See Question&Answers more detail:os...

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

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596 views

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reactjs - How to deploy a Flask+React application to Azure Web Service

I have been working on this app on my localhost, which has Flask as the backend (localhost:5000) and React ... React app without any backend) See Question&Answers more detail:os...

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

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512 views

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reactjs - Global outlined override

In what way can I override global theme such that all components that are using variant = 'outlined' are impacted by that ... core": "^3.9.2", 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 I custom style the underline of Material-UI without using theme?

I have success with outline custom styling when variant="outlined" and I use notchedOutline in InputProps. Otherwise - ... style }} /> ) 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 - Add element to a state React

I already have a state with this: this.setState({ conversation: ( <div> {conversation.map(element => { if ( ... to set a new state from zero 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 - getting error: Cannot read property state of undefined

import React, { Component } from "react"; import FormUpdate from "../components/formUpdate"; import { fetchClothingItem, ... </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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561 views

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reactjs - Use Connect or pass data as props to children

I am new to react and redux. I have a scenario where there are nested components like this. A > B > C ... there. What is the correct approach? See Question&Answers more detail:os...

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

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738 views

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reactjs - Installing create-react-app gives npm ERR! shasum check failed and npm ERR! Unexpected end of JSON input while parsing near '...mojOzGIEI2rg0m24Yb5Oq'

Errors when i use sudo npm install create-react-app -g npm ERR! Linux 4.13.0-39-generic npm ERR ... -react-app other packages installed properly See Question&Answers more detail:os...

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

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739 views

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reactjs - React onClick and preventDefault() link refresh/redirect?

I'm rendering a link with react: render: -> `<a className="upvotes" onClick={this.upvote}>upvote</a>` Then, ... it comes to React. Thank you! See Question&Answers more detail:os...

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

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