create-react-app

问题 Not entirely sure what went wrong in my app here. I'm using create-react-app, and I'm trying to render all of my components into the respective root div. Problem is, I'm able to render all of the components onto the page except the very last one, the Score component. I've even tried throwing that component into a div and I'm still getting the following issue: 'React.Children.only expected to receive a single React element child'. What exactly does this mean? Here's my App.js structure. render

问题 We are going to develop a react pwa with dockersetup and to publish the app on gitlab pages during deployment to master branch. I work on a windows device and cant get the feature of hotreloading in dev-mode. Whenever i make some change, the code isnt recompiling. I have to docker-compose up --build every single time for every change. Is there any possible way to get hotreloading working on a windows/docker/create-react-ap p setup? Following the package.json: { "name": "Appname", "version":

问题 We are going to develop a react pwa with dockersetup and to publish the app on gitlab pages during deployment to master branch. I work on a windows device and cant get the feature of hotreloading in dev-mode. Whenever i make some change, the code isnt recompiling. I have to docker-compose up --build every single time for every change. Is there any possible way to get hotreloading working on a windows/docker/create-react-ap p setup? Following the package.json: { "name": "Appname", "version":

问题 We are going to develop a react pwa with dockersetup and to publish the app on gitlab pages during deployment to master branch. I work on a windows device and cant get the feature of hotreloading in dev-mode. Whenever i make some change, the code isnt recompiling. I have to docker-compose up --build every single time for every change. Is there any possible way to get hotreloading working on a windows/docker/create-react-ap p setup? Following the package.json: { "name": "Appname", "version":

问题 So I'm trying to connect a Flask server to a front end create react app. Right now I just want to verify that I can send json between the two. Below is the code for each and a bit more description on the errors. Create React App fetch import React, { Component } from 'react'; import './App.css'; export default class App extends Component { constructor() { super() this.state = { pyResp: [] } } fetchHelloWorld() { console.log("fetching python localhost"); fetch('http://localhost:5000/', {

问题 So I'm trying to connect a Flask server to a front end create react app. Right now I just want to verify that I can send json between the two. Below is the code for each and a bit more description on the errors. Create React App fetch import React, { Component } from 'react'; import './App.css'; export default class App extends Component { constructor() { super() this.state = { pyResp: [] } } fetchHelloWorld() { console.log("fetching python localhost"); fetch('http://localhost:5000/', {

问题 So I'm trying to connect a Flask server to a front end create react app. Right now I just want to verify that I can send json between the two. Below is the code for each and a bit more description on the errors. Create React App fetch import React, { Component } from 'react'; import './App.css'; export default class App extends Component { constructor() { super() this.state = { pyResp: [] } } fetchHelloWorld() { console.log("fetching python localhost"); fetch('http://localhost:5000/', {

问题 I have a working example with Jest and mocks from __mocks__ directory that works : With simple Jest setup // package.json { "name": "a", "version": "1.0.0", "main": "index.js", "scripts": { "test": "jest" }, ... "devDependencies": { "jest": "^26.6.3" }, "dependencies": { "@octokit/rest": "^18.0.12" } } And then /index.js : const { Octokit } = require("@octokit/rest"); const octokit = new Octokit(); module.exports.foo = function() { return octokit.repos.listForOrg({ org: "octokit", type:

问题 I'm struggling with serving a build created with "create-react-app" using Express with Helmet. I'm getting several errors in the explorer console related to Content Security Policy: csp-errors Of course, it isn't showing the app. I noticed that if a remove Helmet as middleware in Express it works but that's not the solution I want. This is my server code: const express = require('express'); const helmet = require('helmet'); const cors = require('cors'); const morgan = require('morgan'); const

问题 I'm trying to learn React and I noticed that when I used npx create-react-app my-project , it created the App.js file as a functional component, as opposed to a class component, as it did in past versions. I found this commit on create-react-app's repo where they changed it. What I'm trying to figure out, is why they did this? I read this article on class components vs. functional components and as far as I understand it, functional components are stateless. I must be misunderstanding, or