Develop Reference

Webpack "Module not found: Error: Can't resolve './src/'"

I have two HTML pages, each will include it's own bundle. Here is my project structure:
public/
-- dist/
src/
-- firebase/
-- network/
webpack.config.js
Here's my webpack config:
const path = require('path');
const CleanTerminalPlugin = require('clean-terminal-webpack-plugin');
module.exports = {
mode: "development",
entry: {
network: path.resolve(__dirname, 'src') + '/network/index.ts',
firebase: path.resolve(__dirname, 'src') + '/firebase/index.ts'
},
module: {
rules: [
{
test: /\.tsx?$/,
use: 'ts-loader',
exclude: /node_modules/,
},
],
},
resolve: {
extensions: ['.tsx', '.ts', '.js'],
},
output: {
path: path.resolve(__dirname, 'public') + '/dist',
},
plugins: [new CleanTerminalPlugin()]
};
I expect this to create two bundles in public/dist with the names firebase.js and network.js. Instead I get an error:
ERROR in main Module not found: Error: Can't resolve './src/' in 'path/to/project/root'
It also says Field 'browser' doesn't contain a valid alias configuration /path/to/project/root/src/index doesn't exist
And repeats that for .tsx, .ts and .js
I don't know why it's looking for an index.* file in my src/. I didn't specify that as an entry file. If I create a src/index.ts it builds, but only makes one bundle called main which is not my expected behavior.

It ended up being a really stupid issue, but I'll post the answer in case someone needs it.
I was invoking webpack with webpack ./src but webpack without the ./src worked as expected.

How can Vue js load image from /dist/ folder when it does not exist?

So I'm trying to learn Vue.js + webpack and initated a project by following these steps:
f:www\> npm install -g vue-cli
f:www\> vue init webpack-simple my-project
f:www\> cd my-project
f:www\> npm install
f:www\> npm run dev
The default page runs on http://localhost:8080/.
Now, in webpack.config.jsfile I have the following lines:
entry: './src/index.js',
output: {
path: path.resolve(__dirname, './dist'),
publicPath: '/dist/',
filename: 'main.js'
},
and in the index.html we find the following line <script src="/dist/main.js"></script>
At this point I thought Webpack was a bit like Gulp in that it compiles src files and puts them in the /dist/ folder.
But Webpack never creates the /dist/ folder.
How can the Vue logo be loaded from <img src="/dist/logo.png?82b9c7a5a3f405032b1db71a25f67021"> when /dist/ folder does not exist?
Why is main.js not created?
webpack.config.js (short version)
var path = require('path');
var webpack = require('webpack');
module.exports = {
entry: './src/index.js',
output: {
path: path.resolve(__dirname, './dist'),
publicPath: '/dist/',
filename: 'main.js'
},
module: {
rules: [
{
test: /\.css$/,
use: [
'vue-style-loader',
'css-loader'
],
},
{
test: /\.js$/,
loader: 'babel-loader',
exclude: /node_modules/
},
{
test: /\.(png|jpg|gif|svg)$/,
loader: 'file-loader',
options: {
name: '[name].[ext]?[hash]'
}
}
]
},
resolve: {
alias: {
'vue$': 'vue/dist/vue.esm.js'
},
extensions: ['*', '.js', '.vue', '.json']
},
devServer: {
historyApiFallback: true,
noInfo: true,
overlay: true
},
performance: {
hints: false
},
devtool: '#eval-source-map'
};
if (process.env.NODE_ENV === 'production') {
module.exports.devtool = '#source-map';
// http://vue-loader.vuejs.org/en/workflow/production.html
module.exports.plugins = (module.exports.plugins || []).concat([
new webpack.DefinePlugin({
'process.env': {
NODE_ENV: '"production"'
}
}),
new webpack.optimize.UglifyJsPlugin({
sourceMap: true,
compress: {
warnings: false
}
}),
new webpack.LoaderOptionsPlugin({
minimize: true
})
])
}

So after some more googling, I found this turorial that explains the entire webpack-simple setup.
Here is the section regarding the /dist/ folder:
npm run build
Right now we are simply using npm run dev to work with and test out an
installation of the Vue Cli tool. This is great
for testing in the local environment, but what about if you actually
want to publish your application to the web? In this case you will
instead run npm run build. This will build your application for
production and you’ll see a new /dist/ folder which contains the
finished bundle.
So during development, the files are placed in a chached / temp location (not sure where)

Webpack - browser refresh on a file change which isn't module

I want to refresh page when I change (save) ./src/*.js files in my code editor.
The problem is I'm not importing this files in my entry point (with import in index.js) but I'm joining them with a plugin so code is in browser's global scope rather then in module.
Basically I want to split longer JavaScript code into smaller files, I don't want to have modules.
I've tried many configurations and closest to my needs is that below, except that it doesn't refresh browser, (it recompiles).
How can I achieve recompile and refresh on JavaScript which should be in globalscope of the browser (or all code in one module)?
webpack.config.js:
const path = require('path');
const MergeIntoSingleFilePlugin = require('webpack-merge-and-include-globally');
const FileWatcherPlugin = require("file-watcher-webpack-plugin");
module.exports = {
context: __dirname,
entry: { bundle: './src/index.js' },
output: {
filename: '[name].js',
path: path.resolve(__dirname, 'dist')
},
module: {
rules: [{
test: /\.css$/,
use: [
'style-loader',
'css-loader'
]
}]
},
plugins: [
new MergeIntoSingleFilePlugin({
files: {
"app.js": [
path.resolve(__dirname, './src/setup.js'),
path.resolve(__dirname, './src/buttons.js'),
path.resolve(__dirname, './src/circle.js'),
path.resolve(__dirname, './src/wall.js')
]
}
}),
new FileWatcherPlugin({
root: __dirname,
files: ['*.js']
})
],
devServer: {
contentBase: './dist',
watchOptions: {
aggregateTimeout: 300,
poll: 1000
},
hot: true,
inline: true,
// publicPath: "./src",
watchOptions: {
ignored: './node_modules/'
}
}
};
npm start:
webpack-dev-server --open --inline --hot --watch --progress
and the setup.js, buttons.js etc are regular JS script files, not exported classes.
Any ideas appreciated!

Setup webpack with server side rendering to load Sass files in asp.net core project

I'm using a Yeoman project template called "aspnetcore-spa", which is an ASP.net core 1 template working in conjunction with major SPA frameworks (Angular2 and React).
I created a project with Angular2.The biolerplate's code works fine and there is no problem. Once I add Sass loader to webpack.config.js and make a reference to the Sass file from any angular file.
In webpack.config.js :
var isDevBuild = process.argv.indexOf('--env.prod') < 0;
var path = require('path');
var webpack = require('webpack');
var nodeExternals = require('webpack-node-externals');
var merge = require('webpack-merge');
var allFilenamesExceptJavaScript = /\.(?!js(\?|$))([^.]+(\?|$))/;
// Configuration in common to both client-side and server-side bundles
var sharedConfig = {
resolve: { extensions: [ '', '.js', '.ts' ] },
output: {
filename: '[name].js',
publicPath: '/dist/' // Webpack dev middleware, if enabled, handles requests for this URL prefix
},
module: {
loaders: [
{ test: /\.ts$/, include: /ClientApp/, loader: 'ts', query: { silent: true } },
{ test: /\.scss$/,include:/ClientApp/, loaders: ["style", "css", "sass"] },
{ test: /\.html$/,include: /ClientApp/, loader: 'raw' },
{ test: /\.css$/, loader: 'to-string!css' },
{ test: /\.(png|jpg|jpeg|gif|svg)$/, loader: 'url', query: { limit: 25000 } }
]
}
};
// Configuration for client-side bundle suitable for running in browsers
var clientBundleOutputDir = './wwwroot/dist';
var clientBundleConfig = merge(sharedConfig, {
entry: { 'main-client': './ClientApp/boot-client.ts' },
output: { path: path.join(__dirname, clientBundleOutputDir) },
plugins: [
new webpack.DllReferencePlugin({
context: __dirname,
manifest: require('./wwwroot/dist/vendor-manifest.json')
})
].concat(isDevBuild ? [
// Plugins that apply in development builds only
new webpack.SourceMapDevToolPlugin({
filename: '[file].map', // Remove this line if you prefer inline source maps
moduleFilenameTemplate: path.relative(clientBundleOutputDir, '[resourcePath]') // Point sourcemap entries to the original file locations on disk
})
] : [
// Plugins that apply in production builds only
new webpack.optimize.OccurenceOrderPlugin(),
new webpack.optimize.UglifyJsPlugin()
])
});
// Configuration for server-side (prerendering) bundle suitable for running in Node
var serverBundleConfig = merge(sharedConfig, {
entry: { 'main-server': './ClientApp/boot-server.ts' },
output: {
libraryTarget: 'commonjs',
path: path.join(__dirname, './ClientApp/dist')
},
target: 'node',
devtool: 'inline-source-map',
externals: [nodeExternals({ whitelist: [allFilenamesExceptJavaScript] })] // Don't bundle .js files from node_modules
});
module.exports = [clientBundleConfig, serverBundleConfig];
In my component :
import { Component, OnInit } from '#angular/core';
#Component({
selector: 'app-wine',
template: require('./wine.component.html'),
styles: require('./wine.component.scss')
})
export class WineComponent implements OnInit {
constructor() { }
ngOnInit() {
}
}
I have already installed npm packages pertinent to sass loader :
npm install node-sass sass-loader --save-dev
I have checked the main-server.js file in wwwroot/dist folder which is the result of webpack bundling, I saw that the .scss file is loaded and they styles are processed correctly. Once I run the app though, shows this exception which is coming from the server side rendering side:
An unhandled exception occurred while processing the request.
Exception: Call to Node module failed with error: ReferenceError: window is not defined at E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:573:31 at E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:568:48 at module.exports (E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:590:69) at Object. (E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:526:38) at webpack_require (E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:20:30) at E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:501:22 at Object.module.exports (E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:506:3) at webpack_require (E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:20:30) at Object. (E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:129:25) at webpack_require (E:\Dev\MyApp\MyAppCore\src\MyApp.Web\ClientApp\dist\main-server.js:20:30)
It's obviously because of the webpack's server-side rendering, as it's running the code on Node.js side (through ASP.net Core's Javascript Services) and there is a code that is coupled with the DOM window object which is not valid on node.
Any clues?

I managed to fix the problem, here's the web.config.js bit:
(Notice the loaders for .scss files)
module: {
loaders: [
{ test: /\.ts$/, include: /ClientApp/, loader: 'ts', query: { silent: true } },
{ test: /\.scss$/,include:/ClientApp/, loaders: ["to-string", "css", "sass"] },
{ test: /\.html$/,include: /ClientApp/, loader: 'raw' },
{ test: /\.css$/, loader: 'to-string!css' },
{ test: /\.(png|jpg|jpeg|gif|svg)$/, loader: 'url', query: { limit: 25000 } }
]
}
And in the Angular component I changed the styles to this :
(Passed an array of required css files rather than a single css file)
#Component({
selector: 'app-wine',
template: require('./wine.component.html'),
styles: [require('./wine.component.scss')]
})

Webpack multiple entry point confusion

From my initial understanding of webpack's multiple entry point such as
entry: {
a: "./a",
b: "./b",
c: ["./c", "./d"]
},
output: {
path: path.join(__dirname, "dist"),
filename: "[name].entry.js"
}
It will bundle them as a.entry.js, b.entry.js and c.entry.js. There is no d.entry.js since it's part of c.
However at work, these values are confusing me so much. Why is the value an http link and not a file?
app: [
'webpack/hot/dev-server',
'webpack-dev-server/client?http://localhost:21200',
'./lib/index.js'
],
test: [
'webpack/hot/dev-server',
'webpack-dev-server/client?http://localhost:21200',
'./test/test.js'
]

As already stated in a comment on the question, the HTTP URLs are used for webpack-dev-server and its hotloading module. However, you want to ommit those modules for the production version of your bundle, since you don't need the hotloading and it makes your bundle easily over 10.000 lines of code (additionally!).
For the personal interest of the poster, here is an example production config (minimalistic), for a project of mine (called dragJs).
// file: webpack.production.babel.js
import webpack from 'webpack';
import path from 'path';
const ROOT_PATH = path.resolve('./');
export default {
entry: [
path.resolve(ROOT_PATH, "src/drag")
],
resolve: {
extensions: ["", ".js", ".scss"]
},
output: {
path: path.resolve(ROOT_PATH, "build"),
filename: "drag.min.js"
},
devtool: 'source-map',
module: {
loaders: [
{
test: /\.js$/,
loader: 'babel',
include: path.resolve(ROOT_PATH, 'src')
},
{
test: /\.scss$/,
loader: 'style!css!sass'
}
]
},
plugins: [
new webpack.optimize.UglifyJsPlugin()
]
};
A few things:
I only use one entry point, but you could use multiple, just as you do in your example
The entry point only refers to my js file - no webpack-dev-server for production
The config file is written using ECMAScript2015 (thus the name *.babel.js)
It uses sourcemaps and an uglify optimization plugin
The presets for the babel-loader are specified in my .babelrc file
Run webpack with this config via webpack -p --config ./webpack.production.babel.js
If there are any further questions, I would be grateful to answer them in the comments.