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:
npm view react version
16.13.1
And my package.json file is:
{
"name": "probando02",
"version": "0.1.0",
"private": true,
"dependencies": {
"#testing-library/jest-dom": "^4.2.4",
"#testing-library/react": "^9.5.0",
"#testing-library/user-event": "^7.2.1",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-scripts": "3.4.1"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
EDIT: my React environment, as shown by npx create-react-app --info:
Environment Info:
current version of create-react-app: 3.4.1
running from C:\Users\paulo\AppData\Roaming\npm-cache\_npx\21716\node_modules\create-react-app
System:
OS: Windows 10 10.0.18362
CPU: (24) x64 AMD Ryzen Threadripper 1920X 12-Core Processor
Binaries:
Node: 12.16.3 - C:\Program Files\nodejs\node.EXE
Yarn: Not Found
npm: 6.14.7 - C:\Program Files\nodejs\npm.CMD
Browsers:
Edge: 44.18362.449.0
Internet Explorer: 11.0.18362.1
npmPackages:
react: ^16.13.1 => 16.13.1
react-dom: ^16.13.1 => 16.13.1
react-scripts: 3.4.1 => 3.4.1
npmGlobalPackages:
create-react-app: Not Found
So what's going on?
I am using the same version but it works fine for me.
And also here is my package.json file
{
"name": "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",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-scripts": "3.4.1"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
It worked fine for me it was launching the default website in port 3000.
I think its just a update issue or so, just try updating npm.
Related
I just created React App by "npx create-react-app", and then when I do "npm install redux" or "npm install --save-dev redux" or "npm install --save redux" - it just does not modify the package.json
I tried the same thing with "react-redux", "react-thunk"... And still... The package.json remains the same.
I do not know how to fix this.
Please, help.
"name": "basic_redux_setup",
"version": "0.1.0",
"private": true,
"dependencies": {
"#testing-library/jest-dom": "^5.11.8",
"#testing-library/react": "^11.2.3",
"#testing-library/user-event": "^12.6.0",
"react": "^17.0.1",
"react-dom": "^17.0.1",
"react-scripts": "4.0.1",
"web-vitals": "^0.2.4"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
Make sure you are on the right directory while executing the NPM scripts, which must be the same directory where the package.json file is located.
React is installed properly and everything else works, except when I try to run "npm start" in the terminal, it gives me the following error.
Here's my package.json code:
{
"name": "r3-ui",
"version": "0.1.0",
"private": true,
"dependencies": {
"#testing-library/jest-dom": "^5.11.6",
"#testing-library/react": "^11.2.2",
"#testing-library/user-event": "^12.2.2",
"react": "^17.0.1",
"react-dom": "^17.0.1",
"react-scripts": "4.0.1",
"web-vitals": "^0.2.4"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
Do not use & when naming the directory on Windows. Rename UI & Web Design into UI_Web_Design. Anything after the & is treated as a command.
After changing the name of the directory run npm start.
just finished a huge app and tried to deploy it on github but it started throwing 404 errors. I tried to create a fresh new one with just one change in the HTML (just to see that is customized) and it's throwing the same error. The dev version works, the production not.
Here is the error:
DevTools failed to load SourceMap: Could not load content for chrome->
extension://hgmhmanijnjhaffoampdlllchpolkdnj/js/lib/purify.min.js.map:
HTTP error: status code
404, net::ERR_UNKNOWN_URL_SCHEME favicon.ico:1 GET
https://kirilchristov.github.io/favicon.ico 404 manifest.json:1 GET
https://kirilchristov.github.io/manifest.json 404 manifest.json:1
Manifest: Line: 1, column: 1, Syntax error.
Here is a link to the repo: Github Repo
Here is the package.json with the scripts:
{
"home":"https://kirilchristov.github.io/renker",
"name": "gr",
"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",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-scripts": "3.4.3"
},
"scripts": {
"predeploy": "npm run build",
"deploy":"gh-pages -d build",
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
You need three things for CRA to work on gh-pages
A branch with the prod files (default is gh-pages)
✅ You have that (I checked)
Settings enabling gh-pages and select the branch if not default and serve from root
✅ You have that as well, you say
The homepage key inside your package.json
❌ You have home instead of homepage https://create-react-app.dev/docs/deployment#building-for-relative-paths
Try fixing that in your package.json
{
"homepage":"https://kirilchristov.github.io/renker",
"name": "gr",
"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",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-scripts": "3.4.3"
},
"scripts": {
"predeploy": "npm run build",
"deploy":"gh-pages -d build",
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
I have been trying to install React on my pc using both the methods npx and npm but even then my terminal (VSCode) is throwing this error. I am unable to start my custom react app.
I have checked other responses but I was not satisfied.
My current node version is 12.16.2
My current npm version is 6.14.8
My package.json file is :
"name": "myapp",
"version": "0.1.0",
"private": true,
"dependencies": {
"#testing-library/jest-dom": "^4.2.4",
"#testing-library/react": "^9.5.0",
"#testing-library/user-event": "^7.2.1",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-scripts": "3.4.3"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
I have been stuck for hours now. Any help is very much appreciated.
I wanna show page on using 'react-router-dom' in react.
And show error
[react-router-dom#5.2.0 requires a peer of react#>=15 but none is
installed. You must install peer dependencies yourself.].
But my react version is "^16.13.1" already.
package.json
{
"name": "pra_hook",
"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",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-scripts": "3.4.1"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}
I got the same issue. But it got resolved when I use the below command:
npm install react-router-dom
Instead of
npm install -g react-router-dom.
Do [npm install react-router-dom] and work