Related
After I've updated webpack from 3.11.0 to 4.6.0, breakpoints in Angular Typescript started moving automatically at the end of the file during debug.
If I stop debug, they returns where I've placed them.
EXAMPLE (which will explain the situation better than my intro above)
If I have - for example - a .ts file of 100 lines and I set a
breakpoint on typescript on Visual Studio at line 50, when I run my
app debug, the breakpoints moves automatically at the end of the file
(so at line 100). When I stop debug, it returns on line 50.
The issue started when I've updated Webpack to last version and seems like to be related to sourcemap.
I share with you my webpack.config.js content below. After the code snippet, I will also tell you what I've changed from 3.11.0 to 4.6.0.
Can anyone help me to solving this?
P.S.: I've kept the default line that enable in-line sourcemaps if you delete or comment it in the config file (see comment Remove this line if you prefer inline source maps in my code below) because using in-line sourcemaps on typescript literally kills my computer.
MY CODE BELOW
webpack.config.js
const path = require('path');
const webpack = require('webpack');
const merge = require('webpack-merge');
const AngularCompilerPlugin = require('#ngtools/webpack').AngularCompilerPlugin;
const CheckerPlugin = require('awesome-typescript-loader').CheckerPlugin;
var nodeExternals = require('webpack-node-externals');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const isClient = typeof window !== 'undefined';
module.exports = (env) => {
// Configuration in common to both client-side and server-side bundles
const isDevBuild = !(env && env.prod);
const sharedConfig = {
stats: { modules: false },
context: __dirname,
resolve: { extensions: ['.js', '.ts'] },
output: {
filename: '[name].js',
publicPath: 'dist/', // Webpack dev middleware, if enabled, handles requests for this URL prefix
globalObject: 'self'
},
module: {
rules: [
{ test: /\.ts$/, include: /ClientApp/, use: ['awesome-typescript-loader?silent=true', 'angular2-template-loader', 'angular2-router-loader'] },
{ test: /\.html$/, use: 'html-loader?minimize=false' },
{ test: /\.css$/, use: ['to-string-loader', 'style-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize'] },
{ test: /\.(png|jpg|jpeg|gif|svg)$/, use: 'url-loader?limit=25000' },
//font management
{
test: /\.(svg|eot|ttf|woff|woff2)$/,
use: [{
loader: 'file-loader',
options: {
name: 'images/[name].[hash].[ext]'
}
}]
}
]
},
plugins: [new CheckerPlugin()]
};
// Configuration for client-side bundle suitable for running in browsers
const clientBundleOutputDir = './wwwroot/dist';
const clientBundleConfig = merge(sharedConfig, {
entry: { 'main-client': './ClientApp/boot.browser.ts' },
output: { path: path.join(__dirname, clientBundleOutputDir) },
optimization: {
minimizer: [
// specify a custom UglifyJsPlugin here to get source maps in production
new UglifyJsPlugin({
cache: true,
parallel: true,
uglifyOptions: {
compress: false,
ecma: 6,
mangle: true
},
sourceMap: true
})
]
},
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
})
] : [
])
});
// Configuration for server-side (prerendering) bundle suitable for running in Node
const serverBundleConfig = merge(sharedConfig, {
resolve: { mainFields: ['main'] },
entry: { 'main-server': './ClientApp/boot.server.ts' },
plugins: [
new webpack.DllReferencePlugin({
context: __dirname,
manifest: require('./ClientApp/dist/vendor-manifest.json'),
sourceType: 'commonjs2',
name: './vendor'
})
].concat(isDevBuild ? [] : [
]),
output: {
libraryTarget: 'commonjs',
path: path.join(__dirname, './ClientApp/dist')
},
target: 'node',
externals: [nodeExternals()], // in order to ignore all modules in node_modules folder
devtool: 'inline-source-map'
});
return [clientBundleConfig, serverBundleConfig];
};
WHAT CHANGED BETWEEN VERSIONS
webpack.config.js
1. - moved uglify from plugins to optimization, but copy-pasting this configuration from the internet. (Maybe the issue is related to this?)
optimization: {
minimizer: [
// specify a custom UglifyJsPlugin here to get source maps in production
new UglifyJsPlugin({
cache: true,
parallel: true,
uglifyOptions: {
compress: false,
ecma: 6,
mangle: true
},
sourceMap: true
})
]
},
2. - removed AOT webpack plugin from production environment configuration
Solved by disabling browser link in Visual Studio 2017.
Also set "sourcemap:true" on tsconfig.
(webpack.config.js file content below)
I'm trying to make a webpack exclusion on node modules.
I found that using webpack-node-externals works for it but using that on my common config causes this other error:
Require is not defined on reflect-metadata - __webpack_require__ issue
So... I was wondering how can i exclude webpack bundling also on the browser side without getting any issue.
My webpack version: 3.11.0
webpack-config.js
const path = require('path');
const webpack = require('webpack');
const merge = require('webpack-merge');
const AotPlugin = require('#ngtools/webpack').AotPlugin;
const CheckerPlugin = require('awesome-typescript-loader').CheckerPlugin;
var nodeExternals = require('webpack-node-externals');
module.exports = (env) => {
// Configuration in common to both client-side and server-side bundles
const isDevBuild = !(env && env.prod);
const sharedConfig = {
//externals: [nodeExternals()], // in order to ignore all modules in node_modules folder
stats: { modules: false },
context: __dirname,
resolve: { extensions: [ '.js', '.ts' ] },
output: {
filename: '[name].js',
publicPath: 'dist/' // Webpack dev middleware, if enabled, handles requests for this URL prefix
},
module: {
rules: [
{ test: /\.ts$/, use: isDevBuild ? ['awesome-typescript-loader?silent=true', 'angular2-template-loader', 'angular2-router-loader'] : '#ngtools/webpack' },
{ test: /\.html$/, use: 'html-loader?minimize=false' },
{ test: /\.css$/, use: [ 'to-string-loader', 'style-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize' ] },
{ test: /\.(png|jpg|jpeg|gif|svg)$/, use: 'url-loader?limit=25000' }
]
},
plugins: [new CheckerPlugin()]
};
// Configuration for client-side bundle suitable for running in browsers
const clientBundleOutputDir = './wwwroot/dist';
const clientBundleConfig = merge(sharedConfig, {
entry: { 'main-client': './ClientApp/boot.browser.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.UglifyJsPlugin(),
new AotPlugin({
tsConfigPath: './tsconfig.json',
entryModule: path.join(__dirname, 'ClientApp/app/app.browser.module#AppModule'),
exclude: ['./**/*.server.ts']
})
])
});
// Configuration for server-side (prerendering) bundle suitable for running in Node
const serverBundleConfig = merge(sharedConfig, {
resolve: { mainFields: ['main'] },
entry: { 'main-server': './ClientApp/boot.server.ts' },
plugins: [
new webpack.DllReferencePlugin({
context: __dirname,
manifest: require('./ClientApp/dist/vendor-manifest.json'),
sourceType: 'commonjs2',
name: './vendor'
})
].concat(isDevBuild ? [] : [
// Plugins that apply in production builds only
new AotPlugin({
tsConfigPath: './tsconfig.json',
entryModule: path.join(__dirname, 'ClientApp/app/app.server.module#AppModule'),
exclude: ['./**/*.browser.ts']
})
]),
output: {
libraryTarget: 'commonjs',
path: path.join(__dirname, './ClientApp/dist')
},
target: 'node',
externals: [nodeExternals()], // in order to ignore all modules in node_modules folder,
devtool: 'inline-source-map'
});
return [clientBundleConfig, serverBundleConfig];
};
GOT IT!
Before posting my solution, I'd like to thanks Aluan Haddad for his useful comment in my question above.
As suggested by Aluan, in fact, the problem was related to the need to use also a module loader, more than a module bundler.
So, the steps that I followed are these:
Installing requireJS ==> http://requirejs.org/docs/node.html
Removing externals: [nodeExternals()], // in order to ignore all modules in node_modules folder from my common webpack configuration and adding it under my server configuration (done before my question, but it's a really important step) [see webpack.config.js content in the question]
Adding target: 'node', before my externals point above, under my server side section (done before my question, but it's a really important step) [see webpack.config.js content in the question]
This makes sure that browser side keeps target:'web' (default target), and target becomes node just for the server.
launched webpack config vendor command manually from powershell webpack --config webpack.config.vendor.js
launched webpack config command manually from powershell webpack --config webpack.config.js
That worked for me! Hope It will works also for anyone else reading this question and encountering this issue!
This is a branch off of my previous question and applied suggestions. But I am still having major issues.
I now have my babel transpiler, along with a .babelrc file in place. My import code to import my module looks like this:
var init = require('./app/js/modules/toc');
init();
However I'm getting this:
ERROR in ./app/js/script.js
Module not found: Error: Cannot resolve 'file' or 'directory' ./app/js/modules/toc in /projects/project-root/app/js
# ./app/js/script.js 1:11-42
Webpack config:
var debug = process.env.NODE_ENV !== "production";
var webpack = require('webpack');
module.exports = {
context: __dirname,
devtool: debug ? "inline-sourcemap" : null,
entry: "./app/js/script.js",
module: {
rules: [{
test: /\.js$/,
use: 'babel-loader'
}]
},
output: {
path: __dirname + "public/javascripts",
filename: "scripts.min.js"
},
plugins: debug ? [] : [
new webpack.optimize.DedupePlugin(),
new webpack.optimize.OccurenceOrderPlugin(),
new webpack.optimize.UglifyJsPlugin({ mangle: false, sourcemap: false }),
],
};
.babelrc
{
"presets": ["es2015"]
}
Gulptask
//scripts task, also "Uglifies" JS
gulp.task('scripts', function() {
gulp.src('app/js/script.js')
.pipe(webpack(require('./webpack.config.js')))
.pipe(gulp.dest('public/javascripts'))
.pipe(livereload());
});
I'm totally lost...what am I doing wrong?
For my import code I also tried:
import {toc} from './modules/toc'
toc();
UPDATE: As recommended I needed to add resolve to my config. It looks like this now:
var debug = process.env.NODE_ENV !== "production";
var webpack = require('webpack');
module.exports = {
context: __dirname,
devtool: debug ? "inline-sourcemap" : null,
entry: "./app/js/script.js",
resolve: {
extensions: ['.js']
},
module: {
rules: [{
test: /\.js$/,
use: 'babel-loader'
}]
},
output: {
path: __dirname + "public/javascripts",
filename: "scripts.min.js"
},
plugins: debug ? [] : [
new webpack.optimize.DedupePlugin(),
new webpack.optimize.OccurenceOrderPlugin(),
new webpack.optimize.UglifyJsPlugin({ mangle: false, sourcemap: false }),
],
};
Sadly I still get:
ERROR in Entry module not found: Error: Cannot resolve 'file' or
'directory' ./app/js/script.js in /projects/project-root
Does my file structure need to change?
Whenever you import/require a module without specifying a file extension, you need to tell webpack how to resolve it. This is done by the resolve section inside the webpack config.
resolve: {
extensions: ['.js'] // add your other extensions here
}
As a rule of thumb: whenever webpack complains about not resolving a module, the answer probably lies in the resolve config.
Let me know about any further questions and if this works.
EDIT
resolve directly to the root level of your config:
// webpack.config.js
module.export = {
entry: '...',
// ...
resolve: {
extensions: ['.js']
}
// ...
};
You are specifying an entry point in your webpack config AND in gulp. Remove the entry property in your webpack config.
If you specify it twice, the gulp config will tell webpack to get the file in ./app/js/script.jsand then webpack in ./app/js/script.js which will result in a path like ./app/js/app/js/script.js.
Keep us posted if you fixed it. =)
Given that your script is located at ./app/js/script.js and the requested module is there ./app/js/modules/toc, you would need to call it relatively to your script => ./modules/toc should work.
This is because both your script and module are located in the jsfolder.
I am new to Reactjs and am started learning it. I have been trying to start a basic hello world program but its failing at compilation level.
Created a start up hello-word program with create-react-app hello-world it gave me a nice folder structure with bunch of files.
And Here you can see the compilation error
Failed to compile
./src/index.js
Module build failed: Error: Failed to load plugin import: Cannot find module
'eslint-plugin-import'
Referenced from:
at Array.forEach (native)
at Array.reduceRight (native)
This error occurred during the build time and cannot be dismissed.
Here the error states cannot find module so i tried to install eslint plugin import ,standard ..etc but still its not worked.
Below is my webpack.config.dev.js
// #remove-on-eject-begin
/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
// #remove-on-eject-end
'use strict';
const autoprefixer = require('autoprefixer');
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-
plugin');
const InterpolateHtmlPlugin = require('react-dev-
utils/InterpolateHtmlPlugin');
const WatchMissingNodeModulesPlugin = require('react-dev-
utils/WatchMissingNodeModulesPlugin');
const eslintFormatter = require('react-dev-utils/eslintFormatter');
const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
const getClientEnvironment = require('./env');
const paths = require('./paths');
const env = getClientEnvironment(publicUrl);
module.exports = {
// You may want 'eval' instead if you prefer to see the compiled output in
DevTools.
// See the discussion in https://github.com/facebookincubator/create-
react-app/issues/343.
devtool: 'cheap-module-source-map',
entry: [
// We ship a few polyfills by default:
require.resolve('./polyfills'),
// Include an alternative client for WebpackDevServer. A client's job is to
// connect to WebpackDevServer by a socket and get notified about changes.
// When you save a file, the client will either apply hot updates (in case
// of CSS changes), or refresh the page (in case of JS changes). When you
// make a syntax error, this client will display a syntax error overlay.
// Note: instead of the default WebpackDevServer client, we use a custom one
// to bring better experience for Create React App users. You can replace
// the line below with these two lines if you prefer the stock client:
// require.resolve('webpack-dev-server/client') + '?/',
// require.resolve('webpack/hot/dev-server'),
require.resolve('react-dev-utils/webpackHotDevClient'),
// Finally, this is your app's code:
paths.appIndexJs,
// We include the app code last so that if there is a runtime error during
// initialization, it doesn't blow up the WebpackDevServer client, and
// changing JS code would still trigger a refresh.
],
output: {
// Next line is not used in dev but WebpackDevServer crashes without it:
path: paths.appBuild,
// Add /* filename */ comments to generated require()s in the output.
pathinfo: true,
// This does not produce a real file. It's just the virtual path that is
// served by WebpackDevServer in development. This is the JS bundle
// containing code from all our entry points, and the Webpack runtime.
filename: 'static/js/bundle.js',
// There are also additional JS chunk files if you use code splitting.
chunkFilename: 'static/js/[name].chunk.js',
// This is the URL that app is served from. We use "/" in development.
publicPath: publicPath,
// Point sourcemap entries to original disk location (format as URL on
Windows)
devtoolModuleFilenameTemplate: info =>
path.resolve(info.absoluteResourcePath).replace(/\\/g, '/'),
},
resolve: {
modules: ['node_modules', paths.appNodeModules].concat(
// It is guaranteed to exist because we tweak it in `env.js`
process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
),
extensions: ['.web.js', '.js', '.json', '.web.jsx', '.jsx'],
alias: {
// #remove-on-eject-begin
// Resolve Babel runtime relative to react-scripts.
// It usually still works on npm 3 without this but it would be
// unfortunate to rely on, as react-scripts could be symlinked,
// and thus babel-runtime might not be resolvable from the source.
'babel-runtime': path.dirname(
require.resolve('babel-runtime/package.json')
),
// #remove-on-eject-end
// Support React Native Web
// https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-
with-react-native-for-web/
'react-native': 'react-native-web',
},
plugins: [
// Prevents users from importing files from outside of src/ (or
node_modules/).
new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
],
},
module: {
strictExportPresence: true,
rules: [
// TODO: Disable require.ensure as it's not a standard language feature.
// We are waiting for https://github.com/facebookincubator/create-react-
app/issues/2176.
// { parser: { requireEnsure: false } },
// First, run the linter.
// It's important to do this before Babel processes the JS.
{
test: /\.(js|jsx)$/,
enforce: 'pre',
use: [
{
options: {
formatter: eslintFormatter,
eslintPath: require.resolve('eslint'),
// #remove-on-eject-begin
baseConfig: {
extends: [require.resolve('eslint-config-react-app')],
},
ignore: false,
useEslintrc: false,
// #remove-on-eject-end
},
loader: require.resolve('eslint-loader'),
},
],
include: paths.appSrc,
},
{
// "oneOf" will traverse all following loaders until one will
// match the requirements. When no loader matches it will fall
// back to the "file" loader at the end of the loader list.
oneOf: [
{
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
loader: require.resolve('url-loader'),
options: {
limit: 10000,
name: 'static/media/[name].[hash:8].[ext]',
},
},
// Process JS with Babel.
{
test: /\.(js|jsx)$/,
include: paths.appSrc,
loader: require.resolve('babel-loader'),
options: {
// #remove-on-eject-begin
babelrc: false,
presets: [require.resolve('babel-preset-react-app')],
cacheDirectory: true,
},
},
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader turns CSS into JS modules that inject <style> tags.
// In production, we use a plugin to extract that CSS to a file, but
// in development "style" loader enables hot editing of CSS.
{
test: /\.css$/,
use: [
require.resolve('style-loader'),
{
loader: require.resolve('css-loader'),
options: {
importLoaders: 1,
},
},
{
loader: require.resolve('postcss-loader'),
options: {
// Necessary for external CSS imports to work
ident: 'postcss',
plugins: () => [
require('postcss-flexbugs-fixes'),
autoprefixer({
browsers: [
'>1%',
'last 4 versions',
'Firefox ESR',
'not ie < 9', // React doesn't support IE8 anyway
],
flexbox: 'no-2009',
}),
],
},
},
],
},
{
// Exclude `js` files to keep "css" loader working as it injects
// it's runtime that would otherwise processed through "file"
loader.
// Also exclude `html` and `json` extensions so they get processed
// by webpacks internal loaders.
exclude: [/\.js$/, /\.html$/, /\.json$/],
loader: require.resolve('file-loader'),
options: {
name: 'static/media/[name].[hash:8].[ext]',
},
},
],
},
],
},
plugins: [
new InterpolateHtmlPlugin(env.raw),
// Generates an `index.html` file with the <script> injected.
new HtmlWebpackPlugin({
inject: true,
template: paths.appHtml,
}),
new webpack.NamedModulesPlugin(),
new webpack.DefinePlugin(env.stringified),
new webpack.HotModuleReplacementPlugin(),
new CaseSensitivePathsPlugin(),
new WatchMissingNodeModulesPlugin(paths.appNodeModules),
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
],
node: {
dgram: 'empty',
fs: 'empty',
net: 'empty',
tls: 'empty',
child_process: 'empty',
},
performance: {
hints: false,
},
};
Can any one guide me how to come out of this build error.
This means eslint-plugin-import not available in your node_modules.
A fresh npm install eslint-plugin-import and restart the application should fix this issue.
If that didn't fix, try upgrading your npm version:
npm install -g npm#latest
Finally issue got resolved after installing few below packages globally:
eslint-config-react-app
eslint
babel-eslint
eslint-plugin-react
eslint-plugin-import
eslint-plugin-jsx-a11y
eslint-plugin-flowtype
And deleted package.lock.json file then ran npm install
Finally npm start Its just worked. Thank you
Run this command:
"lint:fix": "eslint './src/**/*.{js,jsx}' --fix"
Then fixed all problems.
And Sure file ".eslint.js" has no any problem:
module.exports = {
root: true,
env: {
browser: true,
node: true,
},
parserOptions: {
parser: "babel-eslint",
ecmaVersion: 2020,
sourceType: "module",
},
extends: ["plugin:react/recommended", "plugin:prettier/recommended"],
plugins: [],
rules: {
"react/prop-types": 0,
},
};
I'm a webpack rookie who wants to learn all about it.
I came across a conflict when running my webpack telling me:
ERROR in chunk html [entry] app.js Conflict: Multiple assets emit to
the same filename app.js
What should I do to avoid the conflict?
This is my webpack.config.js:
module.exports = {
context: __dirname + "/app",
entry: {
'javascript': "./js/app.js",
'html': "./index.html",
},
output: {
path: __dirname + "/dist",
filename: "app.js",
},
resolve: {
extensions: ['.js', '.jsx', '.json']
},
module: {
loaders: [
{
test: /\.jsx?$/,
exclude: /node_modules/,
loaders: ["babel-loader"]
},
{
test: /\.html$/,
loader: "file-loader?name=[name].[ext]",
}
]
}
};
i'm not quite familiar with your approach so I'll show you a common way to help you out.
First of all, on your output, you are specifying the filename to app.js which makes sense for me that the output will still be app.js. If you want to make it dynamic, then just use "filename": "[name].js".
The [name] part will make the filename dynamic for you. That's the purpose of your entry as an object. Each key will be used as a name in replacement of the [name].js.
And second, you can use the html-webpack-plugin. You don't need to include it as a test.
I had the same problem, I found it was setting a static output file name that was causing my problem, in the output object try the following object.
output:{
filename: '[name].js',
path: __dirname + '/build',
chunkFilename: '[id].[chunkhash].js'
},
This makes it so that the filenames are different and it doesn't clash.
EDIT:
One thing i've recently found is that you should use a hash instead of chunkhash if using HMR reloading. I haven't dug into the root of the problem but I just know that using chunkhash was breaking my webpack config
output: {
path: path.resolve(__dirname, 'dist'),
filename: '[name].[hash:8].js',
sourceMapFilename: '[name].[hash:8].map',
chunkFilename: '[id].[hash:8].js'
};
Should work fine with HMR then :)
EDIT July 2018:
A little more information on this.
Hash
This is a hash generated every time that webpack compiles, in dev mode this is good for cache busting during development but shouldn't be used for long term caching of your files. This will overwrite the Hash on every build of your project.
Chunkhash
If you use this in conjunction with a runtime chunk then you can use it for long term caching, the runtime chunk will see what's changed in your source code and update the corresponding chunks hash's. It won't update others allowing for your files to be cached.
I had exactly the same problem. The problem seems to occur with the file-loader. The error went away when I removed the html test and included html-webpack-plugin instead to generate an index.html file. This is my webpack.config.js file:
var path = require('path');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var HTMLWebpackPluginConfig = new HtmlWebpackPlugin({
template: __dirname + '/app/index.html',
filename: 'index.html',
inject: 'body'
})
module.exports = {
entry: {
javascript: './app/index.js',
},
output: {
filename: 'bundle.js',
path: __dirname + '/dist'
},
module: {
rules: [
{
test: /\.jsx?$/,
exclude: [
path.resolve(__dirname, '/node_modules/')
],
loader: 'babel-loader'
},
]
},
resolve: {
extensions: ['.js', '.jsx', '.json']
},
plugins: [HTMLWebpackPluginConfig]
}
The html-webpack-plugin generates an index.html file and automatically injects the bundled js file into it.
I had the same issue after upgrading to Webpack 5. My problem was caused by the copy-webpack-plugin.
Below is the original pattern ignoring a specified file, it works with Webpack 4, but throws an error with Webpack 5.
ERROR in Conflict: Multiple assets emit different content to the same
filename default.hbs
plugins: [
new CopyPlugin({
patterns: [
{
from: "./src/academy/templates",
globOptions: {
ignore: ["default.hbs"]
}
},
]
}),
],
To fix the error:
plugins: [
new CopyPlugin({
patterns: [
{
from: "./src/academy/templates",
globOptions: {
ignore: ["**/default.hbs"]
}
},
]
}),
],
By not ignoring the specified file, the default.hbs (a.k.a index.html) was copied twice into the build (a.k.a /disk) directory effectively resulting in Webpack trying to insert multiple assets into the "same" (duplicated) filename.
I had the same problem, and I found these in the documents.
If your configuration creates more than a single “chunk” (as with multiple entry points or when using plugins like CommonsChunkPlugin), you should use substitutions to ensure that each file has a unique name.
[name] is replaced by the name of the chunk.
[hash] is replaced by the hash of the compilation.
[chunkhash] is replaced by the hash of the chunk.
output: {
path:__dirname+'/dist/js',
//replace filename:'app.js'
filename:'[name].js'
}
In my case the source map plugin was conflicting with the extract mini plugin.
Could not find a solution to this anywhere. source maps for css and javascript were writing to the same file. Here is how I finally solved it in my project:
new webpack.SourceMapDevToolPlugin({
filename: '[name].[ext].map'
}),
I encountered this error in my local dev environment. For me, the solution to this error was to force the files to rebuild. To do this, I made a minor change to one of my CSS files.
I reloaded my browser and the error went away.
If you getting same kind error in Angular
Solution : delete cache folder inside .angular folder and
start portal again ng serve
I had the same problem after updating all the dependencies to latest (e.g. webpack 4 -> 5) for a Chrome extension I made about 2 years ago, and managed to solve it.
There were two files in the complaint (popup.html and options.html). Here is my original webpack.config.js file:
const path = require('path');
const CopyPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require("html-webpack-plugin");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");
module.exports = {
target: 'web',
output: {
path: path.resolve(__dirname, 'dist'),
filename: '[name].js',
},
entry: {
popup: './src/scripts/popup.tsx',
options: './src/scripts/options.tsx',
},
context: path.join(__dirname),
module: {
rules: [
{
test: /\.tsx?$/,
loader: 'ts-loader',
},
{
test: /\.css$/,
use: [
'style-loader',
'css-loader',
],
},
{
test: /\.scss$/,
use: [
'style-loader',
'css-loader',
'sass-loader',
],
},
],
},
resolve: {
extensions: ['.tsx', '.ts', '.js', '.json', '.css'],
},
plugins: [
new CleanWebpackPlugin(),
new CopyPlugin([
{ from: 'src/popup.html', to: 'popup.html' },
{ from: 'src/options.html', to: 'options.html' },
{ from: 'src/manifest.json', to: 'manifest.json' },
{ from: 'src/icons', to: 'icons' },
]),
new HtmlWebpackPlugin({
template: path.join("src", "popup.html"),
filename: "popup.html",
chunks: ["popup"]
}),
new HtmlWebpackPlugin({
template: path.join("src", "options.html"),
filename: "options.html",
chunks: ["options"]
}),
]
};
I solved it by removing:
{ from: 'src/popup.html', to: 'popup.html' },
{ from: 'src/options.html', to: 'options.html' },
under new CopyPlugin... part.
So seems like right now there is no need to explicitly copy popup.html and options.html to output folder when HtmlWebpackPlugin is already emitting them.
Similar solution to the above with file-loader, however, I think this solution is the more elegant. Before, I was only specifying the [name], adding the [path][name] resolved my conflict as below:
module: {
rules: [
{
test: /\.(mp4|m4s)$/,
use: [
{
loader: 'file-loader',
options: {
name: '[path][name].[ext]',
},
},
],
},
],
I changed index.html file from /public directory to /src to fix this issue. (Webpack 5.1.3)
The same error in a Vue.js project when doing e2e with Karma. The page was served using a static template index.html with /dist/build.js. And got this error running Karma.
The command to issue Karma using package.json was:
"test": "cross-env BABEL_ENV=test CHROME_BIN=$(which chromium-browser) karma start --single-run"
The output configuration in webpack.config.js was:
module.exports = {
output: {
path: path.resolve(__dirname, './dist'),
publicPath: '/dist/',
filename: 'build.js'
},
...
}
My solution: inspired by the Evan Burbidge's answer I appended the following at the end of webpack.config.js:
if (process.env.BABEL_ENV === 'test') {
module.exports.output.filename = '[name].[hash:8].js'
}
And then it eventually worked for both page serving and e2e.
I had a similar problem while upgrading webpack 3 to webpack 4. After upgrading the modules I came across this error.
WARNING in Conflict: Multiple assets emit different content to the same filename alert-icon.svg
WARNING in Conflict: Multiple assets emit different content to the same filename comment.svg
The problem was caused by fileloader for svg. Solved the error by adding a hash name: '[name].[hash:8].[ext]' making it unique every time webpack compiles.
Provinding the code below:
module: {
rules: [
{
test: /\.svg$/,
loader: 'file-loader',
query: {
name: '[name].[hash:8].[ext]'
}
]
}
webpack 5 solution
Add chunkFilename and assetModuleFilename in output as showed below.
output: {
path: path.join(__dirname, "/build/"),
filename: "js/[name].[contenthash].js",
chunkFilename: 'chunks/[name].[chunkhash].js',
assetModuleFilename: 'media/[name][hash][ext][query]'
},