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Mastering Development

Can’t use createRef in latest version of create-react-app

I am learning React using create-react-app, and I’m getting this error in my app: TypeError: react__WEBPACK_IMPORTED_MODULE_0___default.a.createRef() is not a function Now, I know that this feature was only introduced in React 16.3, but that seems to be the version I have installed. I initialized everything by typing: npx create-react-app probando02 If I check my version: […]

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Mastering Development

Fetch call returns react index.html and chrome gives error Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0

I am trying to fetch data from my local express server, and display it with react, but it seems that the index.html of the react app is being returned. If I check the network tab in the console and it shows that there is a fetch request with the name "projects/" and when I hover […]

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Mastering Development

Fetch call returns react index.html and chrome gives error Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0

I am trying to fetch data from my local express server, and display it with react, but it seems that the index.html of the react app is being returned. If i check the network tab in the console and it shows that there is a fetch request with the name "projects/" and when i hover […]

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Mastering Development

You may need an appropriate loader to handle this file type, currently no loaders are configured to process file

I just created a project using create-react-app (in javascript). In that, I am linking one of my other repository like this { "name": "hh-frontend-example", "version": "0.1.0", "private": true, "dependencies": { "@testing-library/jest-dom": "^4.2.4", "@testing-library/react": "^9.3.2", "@testing-library/user-event": "^7.1.2", "hh-stylesheet": "file:../hh-stylesheet", "react": "^16.13.1", "react-dom": "^16.13.1", "react-scripts": "3.4.1" }, Here notice this line: "hh-stylesheet": "file:../hh-stylesheet", Now, When I start […]

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Mastering Development

How to fix Next.js Vercel deployment module not found error

My next.js app works on my machine and was working when deployed on Vercel but now it fails when building on Vercel with the following error: I’ve tried deleting node_modules and running npm install a few times but with no joy. Any help would be hugely appreciated. Thank you! Analyzing source code… 21:30:52.642 Installing build […]

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Mastering Development

Error 401 while reloading Jwt secured spring Boot React app (and configuration problems)

I’m learning spring boot and react. I have successfully learnt how to use the frontend maven plugin to combine the two. Also JWT kind of works (at least an api call returns what I want while the token is alive and returns error when i set quick expiration time). But react routes work weirdly. I […]

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Mastering Development

My react app on heroku opens home page but will not open other pages

My react app runs fine locally, and deploys to heroku. However, from the home page, any link to another page shows a blank page with ‘not found’ on it. There are no other error messages. Here is my server-side package.json file: { “name”: “portfolio-generator”, “version”: “1.0.0”, “description”: “”, “main”: “server.js”, “engines”: { “node”: “12.16.x” }, […]

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Mastering Development

npm start does nothing on windows

When I try to run npm start just after creating application with npx create-react-app, it does anything and exits with code 0. When I try to execute npm start command, I get the following message: C:\projects\novo-curriculo\ui>npm start > novo-curriculo-ui@0.1.0 start C:\projects\novo-curriculo\ui > react-scripts start When I enable –verbose options, I receive the following logs, which […]

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Mastering Development

Deploying personal github pages (React App) just shows Readme

I’m trying to deploy a user-github page at username.github.io. So not a project page. However, after following steps online, I’m met with just the readme.md. The existing questions about problems releated to this are for github pages (username.github.io/someproject), whilst this is just for username.github.io. Procedure npm install gh-pages –save-dev in package.json: “homepage”: “https://myusername.github.io”, “name”: “homepage”, […]

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Mastering Development

Property does not exist on type ‘IntrinsicAttributes & { children?: ReactNode; }’

I have react project created by Create-React-App having following packages (mentioning packages related to my issue) : “react”: “^16.13.1”, “react-dom”: “^16.13.1”, “react-router-dom”: “^5.1.2”, “react-scripts”: “3.4.1”, “typescript”: “^3.9.2”, “@typescript-eslint/eslint-plugin”: “^2.33.0”, “@typescript-eslint/parser”: “^2.33.0” i have created a simple HOC (which does nothing as of now, but i’ll add my logic later) like this : type Props = […]