I recently started learning React, but right now I am having an issue import one of the components in App.js
My current structure is:
src
--components
----Nav
------Nav.jsx
--App.js
Inside my App.js I have:
import Nav from './src/components/Nav/Nav';
However, I get the following error:
./src/App.js
Module not found: Can't resolve './src/components/Nav/Nav' in 'PATH_TO_PROJECT/project/src'
My webpack.config.js is:
const path = require("path");
module.exports = {
entry: "./src/app.js",
output: {
path: path.join(__dirname, 'public'),
filename: 'bundle.js'
},
module:{
rules:[{
loader: 'babel-loader',
test: /\.js$|jsx/,
exclude: /node_modules/
}],
exports: {
resolve: {
extensions:['.js','.jsx']
}
}
},
devtool: 'cheap-module-eval-source-map',
devServer: {
contentBase: path.join(__dirname, 'public')
}
}
And this is also my package.json:
{
"name": "dashboard",
"version": "0.1.0",
"private": true,
"dependencies": {
"#testing-library/jest-dom": "^5.11.9",
"#testing-library/react": "^11.2.5",
"#testing-library/user-event": "^12.7.1",
"bootstrap": "^4.6.0",
"express": "^4.17.1",
"react": "^17.0.1",
"react-bootstrap": "^1.5.0",
"react-dom": "^17.0.1",
"react-router-dom": "^5.2.0",
"react-scripts": "4.0.2",
"web-vitals": "^1.1.0"
},
"scripts": {
"start": "react-scripts start",
"build": "webpack",
"test": "webpack serve",
"eject": "webpack --watch"
},
"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"
]
},
"devDependencies": {
"#babel/core": "^7.12.3",
"#babel/preset-env": "^7.12.17",
"#babel/preset-react": "^7.12.13",
"babel-loader": "^8.1.0",
"webpack": "^4.44.2",
"webpack-cli": "^4.5.0",
"webpack-dev-server": "^3.11.0"
}
}
I was wondering what am I doing wrong?
The error is occurring due to the wrong project path specification.
The src is the source directory of a react application.
When importing use the following
import Nav from './components/Nav/Nav';
Related
I am trying to get the package react-native-reanimated to compile correctly in my webpack application, however I keep running into errors like these:
ERROR in ./node_modules/react-native-reanimated/lib/createAnimatedComponent.js
Module build failed (from ./node_modules/babel-loader/lib/index.js):
SyntaxError: /home/aftrumpet/app/node_modules/react-native-reanimated/lib/createAnimatedComponent.js: Support for the experimental syntax 'jsx' isn't currently enabled (507:21):
505 | default: { collapsable: false },
506 | });
> 507 | return (<Component {...props} ref={this._setComponentRef} {...platformProps}/>);
| ^
508 | }
509 | }
510 | AnimatedComponent.displayName = `AnimatedComponent(${Component.displayName || Component.name || 'Component'})`;
I know the solution to this is to not exclude the react-native-reanimated module from jsx compilation, however it is not working even though my webpack.config.js has it not excluded. Here is the webpack config:
const path = require('path');
module.exports = {
mode: 'development',
entry: './index.js',
module: {
rules: [
{
test: /\.(js|jsx)$/,
exclude: /node_modules\/(?!react-native-reanimated)/,
use: {
loader: 'babel-loader',
options: {
presets: ['#babel/preset-env', '#babel/preset-react'],
plugins: ['babel-plugin-react-native-web'],
},
},
},
],
},
};
I think there's a possibility the webpack application might not be reading the config, however I did include it in my root directory so this should not be happening.
Here is my package.json if that helps as well:
{
"name": "we_v2",
"version": "0.1.0",
"private": true,
"dependencies": {
"#babel/preset-env": "^7.18.2",
"#babel/preset-react": "^7.17.12",
"#hookform/resolvers": "^2.8.8",
"#testing-library/jest-dom": "^5.16.2",
"#testing-library/react": "^12.1.2",
"#testing-library/user-event": "^13.5.0",
"axios": "^0.26.0",
"clsx": "^1.1.1",
"highcharts": "^9.3.3",
"highcharts-border-radius": "^0.0.4",
"highcharts-react-official": "^3.1.0",
"react": "^17.0.2",
"react-bootstrap": "^2.4.0",
"react-dom": "^17.0.2",
"react-hook-form": "^7.27.0",
"react-native-gesture-handler": "^2.4.2",
"react-native-reanimated": "^2.8.0",
"react-native-web": "^0.17.7",
"react-navigation": "^4.4.4",
"react-router-dom": "^6.2.1",
"react-scripts": "5.0.0",
"sass": "^1.49.7",
"web-vitals": "^2.1.4",
"webpack": "^5.72.1",
"yup": "^0.32.11"
},
"scripts": {
"start": "PORT=8000 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"
]
}
}
I am having trouble getting my MERN boilerplate set up. I'm still learning so the answer may be obvious but I can't find an answer for the current version of webpack, react, babel. I am getting this error when I npm run dev:
Module parse failed: Unexpected token (8:2)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
|
| ReactDOM.render(
> <React.StrictMode>
| <App />
| </React.StrictMode>,
webpack 5.4.0 compiled with 1 error in 231 ms
Which I have figured out means that the loader is not configured; however, I have this :
index.js
import React from 'react';
import ReactDOM from 'react-dom';
import '../css/index.css';
import App from '../components/App';
ReactDOM.render(
<React.StrictMode>
<App />
</React.StrictMode>,
document.getElementById('root')
);
webpack.config.js
var path = require('path');
var webpack = require('webpack');
module.exports = {
entry: {
home: './client/index.js',
// add pages here with link to the js file for each
},
output: {
path: path.resolve(__dirname, 'client'),
filename: 'bundle.js'
},
module: {
rules: [{
test: /\\.jsx?$/,
exclude: /node_modules/,
use: [{
loader: 'babel-loader',
options: {
presets: [
'#babel/preset-env',
'#babel/preset-react'
]
}
}]
},
{
test: /\\.css$/,
use: [
'style-loader',
'css-loader'
]
}]
}
}
package.json
{
"name": "mern-boilerplate",
"version": "0.1.0",
"private": true,
"dependencies": {
"#testing-library/jest-dom": "^5.11.5",
"#testing-library/react": "^11.1.1",
"#testing-library/user-event": "^12.2.0",
"express": "^4.17.1",
"mongoose": "^5.10.13",
"nodemon": "^2.0.6",
"react": "^17.0.1",
"react-dom": "^17.0.1",
"react-scripts": "4.0.0",
"web-vitals": "^0.2.4"
},
"scripts": {
"webpack": "webpack",
"dev": "npm run webpack && nodemon --exec babel-node --bin/www",
"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"
]
},
"devDependencies": {
"#babel/cli": "^7.12.1",
"#babel/core": "^7.12.3",
"#babel/preset-env": "^7.12.1",
"#babel/preset-react": "^7.12.5",
"axios": "^0.21.0",
"babel-loader": "^8.1.0",
"body-parser": "^1.19.0",
"css-loader": "^5.0.1",
"style-loader": "^2.0.0",
"webpack": "^5.4.0",
"webpack-cli": "^4.2.0"
}
}
So, as far as I can tell I have the appropriate #babel/preset-react installed, and the correct webpack dependencies and loaders but webpack hangs with the error at <React.StrictMode>
I am struggling here and would appreciate any help you guys can give me.
Thanks in advance.
Chris
when I run npm run dev (webpack --mode=development) I got the following error.
I m using webpack with Reactjs .
ERROR in ./src/index.js (./node_modules/imports-loader/dist/cjs.js!./node_modules/css-loader/dist/cjs.js??ref--4-3!./node_modules/postcss-loader/src!./src/index.js)
Module build failed (from ./node_modules/postcss-loader/src/index.js):
SyntaxError
(1:1) Unknown word
1 | import React from 'react';
| ^
2 | import ReactDOM from 'react-dom';
3 | import './index.css';
package.json
{
"name": "uitest",
"version": "0.1.0",
"private": true,
"dependencies": {
"#babel/core": "^7.10.2",
"#babel/plugin-proposal-class-properties": "^7.10.1",
"#babel/preset-env": "^7.10.2",
"babel-loader": "^8.1.0",
"babel-preset-react": "6.24.1",
"cra-template": "1.0.3",
"html-webpack-plugin": "^4.3.0",
"path": "^0.12.7",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-hot-loader": "^4.11.1",
"react-scripts": "3.4.1",
"webpack-cli": "^3.3.12",
"yarn": "^1.22.4",
"webpack": "4.43.0",
"webpack-dev-server": "3.11.0"
},
"scripts": {
"start": "react-scripts start",
"webpackdevserver": "webpack-dev-server",
"dev": "webpack-dev-server --mode=development",
"prod": "webpack --mode=production",
"build": "webpack --config prod.config.js",
"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"
]
},
"devDependencies": {
"css-loader": "^3.6.0",
"imports-loader": "^1.0.0",
"node-sass": "^4.14.1"
}
}
webpack.config.js
const path = require('path')
const HtmlWebpackPlugin = require('html-webpack-plugin');
module.exports = {
devServer: {
historyApiFallback: true,
},
entry: path.resolve(__dirname, './src/index.js'),
output: {
path: path.resolve(__dirname, 'dist'),
filename: "main.js"
},
module: {
rules: [{
test: /\.m?js$|jsx|css/,
exclude: /node_modules/,
use: [
"babel-loader",
'style-loader',
'imports-loader',
{
loader: 'css-loader',
options: {
importLoaders: 2,
// 0 => no loaders (default);
// 1 => postcss-loader;
// 2 => postcss-loader, sass-loader
},
},
'postcss-loader',
]
}, ]
},
plugins: [
new HtmlWebpackPlugin({
template: path.resolve(__dirname, 'public/index.html'),
filename: 'index.html'
})
],
};
index.js
import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import * as serviceWorker from './serviceWorker';
ReactDOM.render(
<App/> ,
document.getElementById('root')
);
serviceWorker.unregister();
I'm trying to deploy my app to my website but it deploys without errors in console but blank html page. The following are some of my files.
package.json:
{
"name": "name-here",
"version": "0.1.0",
"private": true,
"dependencies": {
"#material-ui/core": "^4.9.13",
"#testing-library/jest-dom": "^4.2.4",
"#testing-library/react": "^9.3.2",
"#testing-library/user-event": "^7.1.2",
"bootstrap": "^4.4.1",
"react": "^16.13.1",
"react-bootstrap": "^1.0.1",
"react-day-picker": "^7.4.8",
"react-device-detect": "^1.12.1",
"react-dom": "^16.13.1",
"react-hook-form": "^5.6.2",
"react-icons": "^3.10.0",
"react-native-vector-icons": "^6.6.0",
"react-router": "^5.1.2",
"react-router-dom": "^5.1.2",
"react-scripts": "3.4.1",
"react-time-picker": "^4.0.1",
"react-web-vector-icons": "^1.0.2",
"requirejs": "^2.3.6"
},
"devDependencies": {
"#babel/core": "^7.9.6",
"#babel/preset-env": "^7.9.6",
"#babel/preset-react": "^7.9.4",
"babel-loader": "^8.1.0",
"babel-preset-expo": "~8.1.0",
"css-loader": "^3.5.3",
"file-loader": "^6.0.0",
"html-loader": "^1.1.0",
"html-webpack-plugin": "^4.3.0",
"react-scripts": "^3.4.1",
"ttf-loader": "^1.0.2",
"url-loader": "^4.1.0",
"webpack": "^4.43.0",
"webpack-cli": "^3.3.11",
"webpack-dev-server": "^3.11.0"
},
"scripts": {
"start": "webpack-dev-server --mode development",
"build": "webpack --mode production",
"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"
]
}
}
webpack.config.js:
const HtmlWebPackPlugin = require("html-webpack-plugin");
module.exports = {
entry: path.join(__dirname, "src/index.js"),
output: {
path: __dirname + "/dist",
publicPath: "/",
filename: "bundle.js",
},
devServer: {
contentBase: "./dist",
},
resolve: {
extensions: ["*", ".js", ".jsx"],
},
module: {
rules: [
{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
use: ["babel-loader"],
},
{
test: /\.css$/i,
use: ["style-loader", "css-loader"],
},
{
test: /\.(jpe?g|png|gif|svg)$/i,
exclude: /node_modules/,
loader: "url-loader",
},
{
test: /\.html$/,
exclude: /node_modules/,
use: [
{
loader: "html-loader",
},
],
},
{
test: /\.(woff|woff2|eot|ttf)$/,
exclude: /node_modules/,
loader: "url-loader?limit=100000",
},
],
},
plugins: [
new HtmlWebPackPlugin({
template: path.join(__dirname, "public/index.html"),
filename: "./index.html",
}),
],
};
.babelrc
{
"presets": ["#babel/preset-env", "#babel/preset-react"]
}
index.html:
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Name here</title>
</head>
<body>
<div id="root"></div>
</body>
</html>
index.js:
import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from '../src/App';
import 'bootstrap/dist/css/bootstrap.min.css';
ReactDOM.render(
<App />,
document.getElementById('root')
);
Could someone please guide me to a solution? I have generated a build folder and dist folder. It builds successfully.
Your index.html page does not load any js assets. So, it makes sense that you are seeing a blank page.
Might I recommend using create-react-app for bootstrapping a new React project. It gives you a npm run build command, which will create a ready-to-deploy version of your app in the build folder.
I'm using puppeteer in my React project with Webpack and babel. I write this simple code in my component and I get the following error.
async goToPage() {
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto(this.state.url);
}
When I run npm start I don't get any error in the command line. But I get this error in google chrome console. I think there is a mistake in webpack.config.js but I searched a lot and I can't solve it. Please check the following information and help to solve this problem.
Error:
Uncaught ReferenceError: ws is not defined
at eval (external_"ws":1)
at Object.ws (bundle.js:6941)
at __webpack_require__ (bundle.js:725)
at fn (bundle.js:102)
at eval (WebSocketTransport.js:16)
at Object../node_modules/puppeteer/lib/WebSocketTransport.js (bundle.js:4655)
at __webpack_require__ (bundle.js:725)
at fn (bundle.js:102)
at Object.eval (Launcher.js:27)
at eval (Launcher.js:407)
package.json
{
"name": "scrapper",
"version": "0.1.0",
"private": true,
"dependencies": {
"#blueprintjs/core": "^3.9.0",
"axios": "^0.18.0",
"babel-plugin-emotion": "^10.0.0",
"bluebird": "^3.5.3",
"feedparser": "^2.2.9",
"file-loader": "^2.0.0",
"lodash": "^4.17.11",
"promise": "^8.0.2",
"prop-types": "^15.6.2",
"puppeteer": "^1.11.0",
"query-string": "^6.2.0",
"react-grid-layout": "^0.16.6",
"react-redux": "^5.1.1",
"redux": "^4.0.1",
"redux-promise": "^0.6.0",
"url-loader": "^1.1.2",
"ws": "^6.1.2"
},
"scripts": {
"start": "webpack-dev-server --config ./webpack.config.js --mode development",
"build": "webpack --mode production",
"start:react": "react-scripts start",
"build:react": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": [
">0.2%",
"not dead",
"not ie <= 11",
"not op_mini all"
],
"devDependencies": {
"#babel/core": "^7.1.6",
"#babel/plugin-proposal-class-properties": "^7.1.0",
"#babel/preset-env": "^7.1.6",
"#babel/preset-react": "^7.0.0",
"babel-loader": "^8.0.4",
"css-loader": "^1.0.1",
"html-loader": "^0.5.5",
"html-webpack-plugin": "^3.2.0",
"node-sass": "^4.10.0",
"react": "^16.6.3",
"react-dom": "^16.6.3",
"sass-loader": "^7.1.0",
"style-loader": "^0.23.1",
"webpack": "^4.26.0",
"webpack-cli": "^3.1.2",
"webpack-dev-server": "^3.1.10"
}
}
webpack.config.js
const HtmlWebPackPlugin = require("html-webpack-plugin");
const webpack = require("webpack");
module.exports = {
entry: "./src/index.js",
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: "babel-loader"
}
},
{
test: /\.(s*)css$/,
use: [
"style-loader", // creates style nodes from JS strings
"css-loader", // translates CSS into CommonJS
"sass-loader" // compiles Sass to CSS, using Node Sass by default
]
},
{
test: /\.(woff|woff2)$/,
use: {
loader: "url-loader",
options: {
name: "fonts/[hash].[ext]",
limit: 5000,
mimetype: "application/font-woff"
}
}
},
{
test: /\.(ttf|eot|svg)$/,
use: {
loader: "file-loader",
options: {
name: "fonts/[hash].[ext]"
}
}
}
]
},
resolve: {
extensions: ["*", ".js", ".json"]
},
output: {
path: __dirname + "/dist",
publicPath: "/",
filename: "bundle.js"
},
plugins: [
new webpack.HotModuleReplacementPlugin(),
new HtmlWebPackPlugin({
template: "./dist/index.html"
})
],
devServer: {
contentBase: "./dist",
hot: true,
port: 3000,
historyApiFallback: true
},
externals: ['ws']
};
.babelrc
{
"presets": ["#babel/preset-env", "#babel/preset-react"],
"plugins": ["#babel/plugin-proposal-class-properties", "emotion"]
}
i don't know exact problem just try it once, it may works
just instal it : 'npm install --save ws'
else you can look into this documents : "https://www.npmjs.com/package/ws"