Why aren't my stylesheets being included in the Webpack build? - javascript

Webpack collected files (.css, .js) into a library and use it in another React project. The styles specified in the component do not pass, although the .css file is present and the styles are there.
UiButton.jsx file
import styles from './UiButton.module.css';
const UiButton = () => {
return (
<>
<button className={styles.button}>Text</button>
</>
);
}
export default UiButton;
index.js file
import UiButton from './UiButton/UiButton';
import './index.css';
export { UiButton };
Webpack.config.js file
const path = require('path');
const webpack = require('webpack');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
// const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
module.exports = {
entry: { main: './src/index.js' },
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'index.js',
libraryTarget: "umd",
library: "uilibrarytest"
},
module: {
rules: [
{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
use: {
loader: "babel-loader"
}
},
{
test: /\.css$/,
use: [ 'style-loader', MiniCssExtractPlugin.loader, 'css-loader' ]
}
]
},
plugins: [
new CleanWebpackPlugin(),
new MiniCssExtractPlugin({
filename: 'index.css',
}),
// new HtmlWebpackPlugin({
// template: './public/index.html',
// }),
new webpack.ProvidePlugin({
"React": "react",
}),
],
resolve: {
extensions: ['.js', '.jsx'],
},
}
This is what webpack builds:
.button {
background: red;
}
html {
margin: 0;
padding: 0;
}
How to make it so that when using a component from a given library, the styles are also pulled to it ???

Loaders in Webpack are evaluated from right to left. In your configuration the evaluation order is 'css-loader', MiniCssExtractPlugin.loader, and finally 'style-loader'. But 'style-loader' only injects styles into the DOM. You need MiniCssExtractPlugin.loader to be the first element in the "use" array. See below...
{
test: /\.css$/,
use: [ MiniCssExtractPlugin.loader, 'css-loader' ]
}
Furthermore you can tell webpack to use MiniCssExtractPlugin.loader during production and at other times use 'style-loader'.
const isProduction = process.env.NODE_ENV == 'production';
const stylesHandler = isProduction ? MiniCssExtractPlugin.loader : 'style-loader';
...other config
{
test: /\.css$/,
use: [ stylesHandler, 'css-loader' ]
}
And in your package.json scripts,
"build": "webpack --mode=production --node-env=production"

Related

images not loading in html using webpack

I'm having any issue loading images from a different folder than where my index.html file is located. Below is the message I am getting from the console.
GET http://localhost:3000/company-logo.jpg 404 (Not Found)
Here is my file directory
webpack.config.js
const currentTask = process.env.npm_lifecycle_event
const path = require('path')
const {CleanWebpackPlugin} = require('clean-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const fse = require('fs-extra')
const postCSSPlugins = [
require('postcss-import'),
require('postcss-simple-vars'),
require('postcss-nested'),
require('autoprefixer')
]
class RunAfterComile {
apply(compiler) {
compiler.hooks.done.tap('Copy images', function() {
fse.copySync('./public/images', './dist/public/images')
})
}
}
let cssConfig = {
test: /\.css$/i,
use: ['css-loader?url=false', {loader: 'postcss-loader', options: {plugins: postCSSPlugins}}]
}
let pages = fse.readdirSync('./views').filter(function(file) {
return file.endsWith('.html')
}).map(function(page) {
return new HtmlWebpackPlugin({
filename: page,
template: `./views/${page}`
})
})
let config = {
entry: './public/scripts/App.js',
plugins: pages,
module: {
rules: [
cssConfig
]
}
}
if (currentTask == 'dev') {
cssConfig.use.unshift('style-loader')
config.output = {
filename: 'bundled.js',
path: path.resolve(__dirname, 'public')
}
config.devServer = {
before: function(app, server) {
server._watch('./views/**/*.html')
},
contentBase: path.join(__dirname, './views'),
hot: true,
port: 3000
}
config.mode = 'development'
}
if (currentTask == 'build') {
config.module.rules.push({
test: /\.js$/,
exclude: /(node_modules)/,
use: {
loader: 'babel-loader',
options: {
presets: ['#babel/preset-env']
}
}
})
cssConfig.use.unshift(MiniCssExtractPlugin.loader)
postCSSPlugins.push(require('cssnano'))
config.output = {
filename: '[name].[chunkhash].js',
chunkFilename: '[name].[chunkhash].js',
path: path.resolve(__dirname, 'dist')
}
config.mode = 'production'
config.optimization = {
splitChunks: {chunks: 'all'}
}
config.plugins.push(
new CleanWebpackPlugin(),
new MiniCssExtractPlugin({filename: 'styles.[chunkhash].css'}),
new RunAfterComile()
)
}
module.exports = config
The css works perfectly fine. I seem to only be having problems with images.
I tried the following file paths but they didn't work. I think I am missing something.
index.html
<img src="./company-logo.jpg" alt="dfgadfg">
<img src="../public/images/company-logo.jpg" alt="dfgadfg">
<img src="./images/company-logo.jpg" alt="dfgadfg">
any help would be appreciated. Thank you very much.
Try use
module: {
rules: [
{
test: /\.(png|svg|jpg|gif)$/,
use: [
'file-loader',
],
},
],
},
You might require file-loder to get the images correctly served
rules: [
{
test: /\.(png|jpe?g|gif)$/i,
loader: 'file-loader',
options: {
outputPath: 'images' // Chage this like 'public/images' or any other relative path to the root
}
},
...
]
Try to inspect and check how the images are loading in Source tab of Developer Tools, change the outputPath accordingly.
Update
If images are still not loading to Source tab of browser, try importing it in your App.js (Entry point file)
....
import "../public/images/company-logo.jpg";
...

Import a SCSS "exported" variable into the Javascript code within a .vue file that is loaded by vue-loader and bundled by webpack

I have a variable in my vars.scss that I want to access from Javascript in root/app/app.vue.
root/app/scss/vars.scss
:export {
cursor: #fff;
}
root/app/app.vue
<template>
<div id="yes">
</div>
</template>
<script lang="ts">
import Vue from 'vue';
import colors from '#/scss/vars.scss';
export default Vue.extend({
mounted() {
console.log(colors.cursor);
},
});
</script>
<style >
</style>
I have read approximately 30 different stackoverflow questions that appear to be dealing with the similar problem of importing variables into the style block of the .vue file, as well as the identical problem of importing the variables directly into the Javascript code. As a result, my webpack.config.js looks like the following:
root/webpack.config.js
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const webpack = require('webpack');
const VueLoaderPlugin = require('vue-loader/lib/plugin');
const env = process.env.NODE_ENV
module.exports = {
entry: './app/index.ts',
output: {
filename: 'main.js',
path: path.resolve(__dirname, 'staticfiles')
},
resolve: {
extensions: [ '.ts', '.js', '.vue', '.scss', '.sass'],
alias: {
'vue$': 'vue/dist/vue.esm.js',
'#': path.resolve(__dirname, '/app/')
}
},
plugins: [
new HtmlWebpackPlugin(),
new CleanWebpackPlugin(),
new webpack.HotModuleReplacementPlugin(),
new VueLoaderPlugin()
],
module: {
rules: [
{
enforce: 'pre',
test: /\.(js|vue|ts)$/,
loader: 'eslint-loader',
exclude: /node_modules/
},
{
test: /\.vue$/,
loader: 'vue-loader',
options: {
loaders: {
// Since sass-loader (weirdly) has SCSS as its default parse mode, we map
// the "scss" and "sass" values for the lang attribute to the right configs here.
// other preprocessors should work out of the box, no loader config like this necessary.
'scss': 'vue-style-loader!css-loader!sass-loader',
'sass': 'vue-style-loader!css-loader!sass-loader?indentedSyntax',
}
// other vue-loader options go here
}
},
{
test: /\.css$/,
use: [
'vue-style-loader',
'css-loader'
]
},
{
test: /\.tsx?$/,
loader: 'ts-loader',
exclude: /node_modules/,
options: {
appendTsSuffixTo: [/\.vue$/],
}
},
{
test: /\.(png|jpg|gif|svg)$/,
loader: 'file-loader',
options: {
name: '[name].[ext]?[hash]'
}
},
{
test: /\.s(a|c)ss$/,
use: [ {
loader: "style-loader",
options: {
sourceMap: env === 'development',
}
}, {
loader: "css-loader",
options: {
sourceMap: env === 'development',
}
}, {
loader: "sass-loader",
options: {
sourceMap: env === 'development',
}
},
'vue-style-loader'],
}]
}
};
I have also tried, in the test: /\.s(a|c)ss$/ section, to put vue-style-loader at the beginning of the array.
I have tried many combinations of filenames when attempting to import the .scss file, such as relative (../scss/vars.scss), removing the extension, using .css as an extension, etc.
The error I get is:
ERROR in /home/Documents/application/app/app.vue.ts
[tsl] ERROR in /home/Documents/application/app/app.vue.ts(10,28)
TS2307: Cannot find module '#/scss/vars.scss'.
My question:
In a project that uses vue-style-loader and vue-loader to build .vue files with webpack, how can I import .scss variables into the <script> portion of a .vue file? (please note - I am NOT attempting to import them into the <style> section of the .vue file)
An example based on my comment:
SCSS fragment:
$foo: #333;
body {
--variable-foo: $foo;
}
And then anywhere in the JavaScript
const value = document.body.style.getPropertyValue("--variable-foo");
console.log(value); // outputs "#333"

Unexpected token You may need an appropriate loader to handle this file type.importing strapi sdk

Hi I am trying to import javascript strapi sdk (link) in my new project which is configured using web pack
Here is my code yet
index.ts file
import * as $ from 'jquery';
import Strapi from 'strapi-sdk-javascript'
const strapi = new Strapi('http://localhost:1337')
here is my webpack.config.file
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const webpack = require('webpack');
const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
module.exports = {
entry: './src/index.ts',
module: {
rules: [
{
test: /\.js$/,
use:
{loader: 'babel-loader',
options: {
presets: ['env']
}
},
// include: [path.resolve(__dirname, "./src/app")],
exclude: /node_modules/
}
]
},
resolve: {
extensions: ['.tsx', '.ts', '.js'],
alias: {
$: "jquery/src/jquery",
}
},
devtool: 'inline-source-map',
devServer: {
contentBase: './dist'
},
plugins: [
new CleanWebpackPlugin(['dist']),
new HtmlWebpackPlugin({
template: 'src/assets/template.html'
})
],
output: {
filename: '[name].bundle.js',
path: path.resolve(__dirname, 'dist')
}
};
and this is giving my this error
what am i doing wrong here . please
help thanks in advance
You can try something like this
// Process JS with Babel.
{
test: /\.(js|jsx|mjs)$/,
include: [path.resolve(__dirname,"./src/app")path.resolve('node_modules/strapi-sdk-javascript')],
loader: require.resolve('babel-loader'),
},

Thumbnail component issue in react

I have added the thumbnail component into my project. I got to see the following error in my project after adding it. The error is shown in the following image.
Here's my webpack.config.js file code which might help you on understanding the issue. There's a loader to be specified there. I don't know what's the specified loader for this. Anyone faced the same issue?
Any help?
**/*webpack.config.js*/**
/* eslint comma-dangle: ["error",
{"functions": "never", "arrays": "only-multiline", "objects":
"only-multiline"} ] */
const webpack = require('webpack');
const pathLib = require('path');
const devBuild = process.env.NODE_ENV !== 'production';
const config = {
entry: [
'es5-shim/es5-shim',
'es5-shim/es5-sham',
'babel-polyfill',
'./app/bundles/HelloWorld/startup/registration',
],
output: {
filename: 'webpack-bundle.js',
path: pathLib.resolve(__dirname, '../app/assets/webpack'),
},
resolve: {
extensions: ['.js', '.jsx'],
},
plugins: [
new webpack.EnvironmentPlugin({ NODE_ENV: 'development' }),
],
module: {
rules: [
{
test: require.resolve('react'),
use: {
loader: 'imports-loader',
options: {
shim: 'es5-shim/es5-shim',
sham: 'es5-shim/es5-sham',
}
},
},
{
test: /\.jsx?$/,
use: 'babel-loader',
exclude: /node_modules/,
},
{
test: /\.css$/,
include: /node_modules/,
loaders: ['style-loader', 'css-loader'],
},
],
},
};
module.exports = config;
if (devBuild) {
console.log('Webpack dev build for Rails'); // eslint-disable-line no-console
module.exports.devtool = 'eval-source-map';
} else {
console.log('Webpack production build for Rails'); // eslint-disable-line no-console
}
And Here's the code where I called the component:
import React, { Component } from 'react';
import Thumbnail from 'react-native-thumbnail-video';
class VideoThumnail extends Component {
render() {
return(
<div>
<Thumbnail url="https://www.youtube.com/watch?v=lgj3D5-jJ74" />
</div>
);
}
}
export default VideoThumnail;
You have a rule only for jsx. Try to add js extension in webpack also
{
test: /\.(js|jsx)$/,
use: 'babel-loader',
exclude: /node_modules/,
}
Also i see es6 synax, so try to add .babelrc in project root with this
{
"presets": ["stage-0"]
}
and install babel-preset-env (npm install --save babel-preset-env)

how to install reactjs npm package correctly

Hi I want to install this reactjs package called react-dropdown-input
https://github.com/RacingTadpole/react-dropdown-input/
I ran this command
$npm install react-dropdown-input --save
in my local folder in git bash. After that I checked my package.json, it says "react-dropdown-input": "^0.1.11" which means i have installed it correctly.
Then i tried to use it in my js file
import React from 'react'
import PropTypes from 'prop-types';
var DocumentTitle = require('react-document-title');
//var DropdownInput = require('react-dropdown-input');
When i added the fifth line, my page just could not load anymore (a blank page)
I dont know how to fix this.
Here's my webpack.config.js
process.env.NODE_ENV = process.env.NODE_ENV || 'development';
const path = require('path');
const webpack = require('webpack');
const BaseFolder = 'static/'; //relative to html path
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const extractLess = new ExtractTextPlugin({
filename: '[name].[contenthash].css',
disable: process.env.NODE_ENV === 'development'
});
var loaders = ['babel-loader'];
var port = process.env.PORT || 3000;
var vendor = ['react', 'react-dom', 'react-router', 'whatwg-fetch', 'es6-promise'];
var outputDir = 'dist';
var entry = {
filename: path.resolve(__dirname, 'src/app.js'),
}
var plugins = [
new webpack.optimize.CommonsChunkPlugin({
name:'vendor',
minChunks: Infinity,
filename: BaseFolder + 'js/[name].js',
}),
new HtmlWebpackPlugin({
template: path.join(__dirname, '/src/index.html'),
filename: 'index.html',
inject: 'body'
}),
new webpack.DefinePlugin({
'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV),
'BaseFolder': JSON.stringify(BaseFolder)
}),
//new webpack.optimize.LimitChunkCountPlugin({maxChunks: 1}),
extractLess,
new webpack.ProvidePlugin({
Promise: 'es6-promise',
fetch: 'imports-loader?this=>global!exports-loader?global.fetch!whatwg-fetch',
React: 'react',
jsSHA: 'jssha',
wx: 'weixin-js-sdk'
}),
new CopyWebpackPlugin([
{
from: 'src/images',
to: BaseFolder + 'images'
}
])
];
if (process.env.NODE_ENV === 'development') {
//devtool ='eval-source-map';
loaders = ['react-hot-loader'].concat(loaders);
plugins = plugins.concat([
new webpack.HotModuleReplacementPlugin()
]);
entry = Object.keys(entry).reduce(function (result, key) {
result[key] = [
'webpack-dev-server/client?http://0.0.0.0:' + port,
'webpack/hot/only-dev-server',
entry[key]
];
return result;
}, {});
}
entry.vendor = vendor;
module.exports = env => {
return {
entry: entry,
output: {
filename: BaseFolder+'js/bundle.js',
chunkFilename: BaseFolder+'js/[id].chunk.js',
path: path.resolve(__dirname, outputDir),
publicPath: '/'
},
externals: [
],
module: {
loaders: [
{
test: /.jsx?$/,
loader: loaders,
exclude: /node_modules/,
include: __dirname
},
{ test: /\.js$/, exclude: /node_modules/, loaders: loaders, include: __dirname},
{ test: /\.scss$/, exclude: /node_modules/, loader: 'style-loader!css-loader?modules&importLoaders=2&sourceMap&localIdentName=[local]___[hash:base64:5]!autoprefixer?browsers=last 2 version!sass?outputStyle=expanded&sourceMap&includePaths[]=node_modules/compass-mixins/lib'},
{ test: /\.css$/, loader: 'style-loader!css-loader', exclude: /\.useable\.css$/},
{
test: /\.useable\.css$/,
use: [
{
loader: 'style-loader/useable'
},
{ loader: 'css-loader' },
],
},
{ test: /\.(png|jpg|jpeg|gif)$/, loader: 'url-loader?limit=100000&name='+BaseFolder+'images/[name].[ext]' },
{ test: /\.eot(\?v=\d+\.\d+\.\d+)?$/, loader: 'file-loader?name='+BaseFolder+'fonts/[name].[ext]' },
{ test: /\.(woff|woff2)$/, loader:'url-loader?prefix=font/&limit=5000&name='+BaseFolder+'fonts/[name].[ext]' },
{ test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/, loader: 'url-loader?limit=10000&mimetype=application/octet-stream&name='+BaseFolder+'fonts/[name].[ext]' },
{ test: /\.svg(\?v=\d+\.\d+\.\d+)?$/, loader: 'url-loader?limit=10000&mimetype=image/svg+xml&name='+BaseFolder+'images/[name].[ext]' },
]
},
plugins: plugins
}
};
Yes this must be included in your node_modules, but the point is that you have include that in your compiled js file or not, i.e.
you must have used webpack or gulp to compile all your dependencies of js to give one file and you must have forget to include that dependency file in webpack file or gulpfile, Please check or provide sample of your webpack or gulpfile.
I think that DropdownInput is named export from react-dropdown-input since in index.js file in the repository its exported as
module.exports = DropdownInput;
So need to import it like
import {DropdownInput} from 'react-dropdown-input'

Categories