Hi I'm a fairly new programmer in webpack, I am trying to create react app using webpack. but i am getting this error.
Error
Child html-webpack-plugin for "index.html":
1 asset
Entrypoint undefined = ./index.html
webpack.config.js
[![const HtmlWebPackPlugin = require("html-webpack-plugin");
const path = require('path')
const htmlPlugin = new HtmlWebPackPlugin({
template: "./src/index.html",
filename: "./index.html"
});
module.exports = {
entry: "index.js",
output: {
path: path.resolve('dist'),
filename: 'bundle.js'
},
module: {
rules: \[
{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: "babel-loader",
options: {
"presets": \["env", "react"\]
}
}
}
\]
},
plugins: \[htmlPlugin\],
devServer: {
contentBase: './dist',
hot: true
}
};
This is My Project structure
[https://i.stack.imgur.com/ve1oa.png]
Maybe filename: "./index.html" should be filename: "index.html" ?
Or just remove it
Seems like this error message is harmless and can be ignored: html-webpack-plugin issue #895
Related
I have a problem with react webpack4 when i try to hot reload the changes fom certain files. And those files where the ones i modified from its original path (/from /src/containers to /src/components)
Rest of files reloading working well...
Code of my webpack config file is below:
const path = require('path');
const HtmlWebPackPlugin = require("html-webpack-plugin");
const Dotenv = require('dotenv-webpack');
const htmlWebpackPlugin = new HtmlWebPackPlugin({
template: "./src/index.html",
filename: "./index.html"
});
module.exports = {
output: {
path: path.join(__dirname, './'),
publicPath: '/'
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: "babel-loader"
}
},
{
test: /\.html$/,
use: [
{
loader: "html-loader",
options: { minimize: true }
}
]
},
{
test: /\.css$/,
use: [
{
loader: "style-loader"
},
{
loader: "css-loader",
options: {
modules: true,
importLoaders: 1,
localIdentName: "[name]_[local]_[hash:base64]",
sourceMap: true,
minimize: true
}
}
]
}
]
},
plugins: [
new HtmlWebPackPlugin({
template: "./src/index.html",
filename: "./index.html"
}),
new Dotenv()
],
devServer: {
historyApiFallback: true,
}
};
If you can share the error log, I may tell what is the real problem. But current config is missing for an entry point. If your application is a single page app, do it like the following code;
module.exports = {
entry: path.join(__dirname, "src", "index.js"),
...
}
if you are building multi page application do it like the following code;
module.exports = {
entry: {
pageOne: path.join(__dirname, "src", "pageOne", "index.js"),
pageTwo: path.join(__dirname, "src", "pageTwo", "index.js"),
pageThree: path.join(__dirname, "src", "pageThree", "index.js")
}
...
}
For anyone arriving here and having this issue, I had this exact problem where files in my 'src/components' directory weren't hot reloading.
I was able to fix it when I saw in the log that webpack was looking for the directory 'src/Components' for some reason, so I changed the name of the components directory to something totally different like 'placeholder' then changed it back to 'components' and ran a fresh install.
first and foremost I need to say that I know little of fundamentals of Webpack, and this is probably why I can't find a solution.
So I know in order to load images I need to require a path instead of just typing it as a string require('path/to/image')
Then I got an external library where I need to pass a path property, where lay multiple images. It doesn't seem to work, so how can I load them into my website?
<CountrySelect
multi={false}
flagImagePath="../../../public/flags/" //folder with multiple images
/>
Webpack config:
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const outputDirectory = 'dist';
module.exports = {
entry: './src/client/index.js',
output: {
path: path.join(__dirname, outputDirectory),
filename: 'bundle.js',
publicPath: '/',
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader'
}
},
{
test: /\.css$/,
use: ['style-loader', 'css-loader']
},
{
test: /\.(png|woff|woff2|eot|ttf|svg|jpg|jpeg)$/,
loader: 'url-loader?limit=100000'
}
]
},
devServer: {
historyApiFallback: true,
port: 3000,
open: true,
proxy: {
'/api': 'http://localhost:8080'
}
},
plugins: [
new CleanWebpackPlugin([outputDirectory]),
new HtmlWebpackPlugin({
template: './public/index.html',
favicon: './public/favicon.ico'
})
]
};
image-webpack-loader - automatically reduces/compress the bigger image.
url-loader - if image size is small it will included as part of bundle.js otherwise separate directory is created and images are placed inside of it.
npm install --save-dev image-webpack-loader url-loader file-loader
webpack.config.js
const config = {
entry: './src/index.js',
output: {
path: path.resolve(__dirname, 'build'),
filename: 'bundle.js',
publicPath: 'build/' //This is important to load your images.
},
module: {
rules: [
{
test: /\.js$/,
use: [
{ loader: 'babel-loader' },
]
},
{
test: /\.css$/,
use: ['style-loader', 'css-loader'],
},
{
test: /\.(gif|png|jpe?g|svg)$/i,
use: [
{
loader: 'url-loader',
options: { limit: 40000 } //if image of size lessthan 40kb include it in bundle.js
},
'image-webpack-loader'
]
}
]
}
}
Sample Code.
import big from '../images/big.jpg';
import small from '../images/small.png';
const image = document.createElement('img');
image.src = small;
document.body.appendChild(image);
const bigimage = document.createElement('img');
bigimage.src = big;
document.body.appendChild(bigimage);
you can learn more about webpack from Handling Images with Webpack.
I solved the problem by using CopyWebpackPlugin.
plugins: [
new CleanWebpackPlugin([outputDirectory]),
new HtmlWebpackPlugin({
template: './public/index.html',
favicon: './public/favicon.png'
}),
new CopyWebpackPlugin([{ from: './public/flags', to: 'flags', toType: 'dir'
}]),
]
and in CountrySelect:
flagImagePath="/flags/"
So that in the time of production, where static directory is dist, flags are derived from dist directory.
The errors I get below are shown in the console after I refresh on a nested route (register/email-confirmation). Whereas non-nested routes do not get this error.
I think the main problem is that it's searching for bundle.js and the image in the nested route path, as opposed to the root path.
The errors in my console:
GET http://localhost:3002/register/bundle.js net::ERR_ABORTED
Refused to execute script from 'http://localhost:3002/register/bundle.js' because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled.
GET http://localhost:3002/register/a5e694be93a1c3d22b85658bdc30008b.png 404 (Not Found)
My webpack.config.js:
const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const BUILD_PATH = path.resolve( __dirname, "./client/build" );
const SOURCE_PATH = path.resolve( __dirname, "./client/src" );
const PUBLIC_PATH = "/";
...
module.exports = {
devtool: 'eval-source-map',
context: SOURCE_PATH,
entry: ['babel-polyfill', SOURCE_PATH + '/index.jsx'],
module: {
rules: [
{
test: /\.jsx?$/,
exclude: [/node_modules/, /server/],
use: {
loader: 'babel-loader',
options: {
presets: ['env', 'es2015', 'react', 'stage-1', 'stage-0', 'stage-2'],
plugins: [
'transform-decorators-legacy',
'transform-es2015-destructuring',
'transform-es2015-parameters',
'transform-object-rest-spread'
]
}
}
},
{
test: /\.scss$/,
use: [{
loader: "style-loader"
}, {
loader: "css-loader"
}, {
loader: "sass-loader"
}]
},
{
test: /\.(png|jpg|gif)$/,
use: [
{
loader: 'file-loader',
options: {}
}
]
},
],
},
output: {
path: BUILD_PATH,
filename: "bundle.js",
},
devServer: {
compress: true,
port: 3002,
historyApiFallback: true,
contentBase: BUILD_PATH,
publicPath: PUBLIC_PATH,
},
plugins: [
new webpack.DefinePlugin(appConstants),
new HtmlWebpackPlugin({
filename: 'index.html',
template: path.resolve(__dirname, 'client/src/index.html'),
inject: true
}),
],
watch: true,
}
I don't know about this bug, but I highly recommend using fuse-box
fuse-box is the future of the build systems, within few minutes you will be running your project with high speed hot reload and many others utitilites...
check this react example seed, it's incredibly amazing..
I've read multiple threads regarding similar issues and tried some propositions, but had no results.
I've followed few tutorials related to React.js and WebPack 3. As the result the application is working well on all browsers (at this moment) except IE 10 and below. The error points to bundle.js (once I'm using the configuration Nr.1):
SCRIPT1002: Syntax error and the line - const url = __webpack_require__(83);
With configuration Nr2., on local server - : SCRIPT1002: Syntax error - line with eval()
And the same configuration, but running on remote server produces a bit different error:
SCRIPT5009: 'Set' is undefine
WebPack configuration Nr1.:
const HtmlWebpackPlugin = require('html-webpack-plugin');
const HtmlWebpackPluginConfig = new HtmlWebpackPlugin({
template: './index.html',
filename: 'index.html',
inject: 'body'
})
module.exports = {
entry: './index.js',
output: {
filename: 'bundle.js'
},
module: {
loaders: [
{
test: /\.json$/,
exclude: /node_modules/,
loader: 'json-loader'
},
{
test: /\.css$/,
loader: "style-loader!css-loader"
}
],
rules: [
{
test: /\.js$/,
exclude: /(node_modules)/,
use: {
loader: 'babel-loader',
options: {
presets: ['env', 'react']
}
}
}
]
},
devServer: {
historyApiFallback: true,
contentBase: './'
},
plugins: [HtmlWebpackPluginConfig]
}
WebPack configuration Nr2.:
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const PreloadWebpackPlugin = require('preload-webpack-plugin');
const ScriptExtHtmlWebpackPlugin = require('script-ext-html-webpack-plugin');
const StyleExtHtmlWebpackPlugin = require('style-ext-html-webpack-plugin');
const CompressionPlugin = require('compression-webpack-plugin');
const autoprefixer = require('autoprefixer');
const staticSourcePath = path.join(__dirname, 'static');
const sourcePath = path.join(__dirname);
const buildPath = path.join(__dirname, 'dist');
module.exports = {
stats: {
warnings: false
},
devtool: 'cheap-eval-source-map',
devServer: {
historyApiFallback: true,
contentBase: './'
},
entry: {
app: path.resolve(sourcePath, 'index.js')
},
output: {
path: path.join(__dirname, 'dist'),
filename: '[name].[chunkhash].js',
publicPath: '/'
},
resolve: {
extensions: ['.webpack-loader.js', '.web-loader.js', '.loader.js', '.js', '.jsx'],
modules: [
sourcePath,
path.resolve(__dirname, 'node_modules')
]
},
plugins: [
new webpack.DefinePlugin({
'process.env.NODE_ENV': JSON.stringify('production')
}),
new webpack.optimize.ModuleConcatenationPlugin(),
new webpack.optimize.CommonsChunkPlugin({
name: 'vendor',
filename: 'vendor.[chunkhash].js',
minChunks: Infinity
}),
new webpack.LoaderOptionsPlugin({
options: {
postcss: [
autoprefixer({
browsers: [
'last 3 version',
'ie >= 10'
]
})
],
context: staticSourcePath
}
}),
new webpack.HashedModuleIdsPlugin(),
new HtmlWebpackPlugin({
template: path.join(__dirname, 'index.html'),
path: buildPath,
excludeChunks: ['base'],
filename: 'index.html',
minify: {
collapseWhitespace: true,
collapseInlineTagWhitespace: true,
removeComments: true,
removeRedundantAttributes: true
}
}),
new PreloadWebpackPlugin({
rel: 'preload',
as: 'script',
include: 'all',
fileBlacklist: [/\.(css|map)$/, /base?.+/]
}),
new webpack.NoEmitOnErrorsPlugin(),
new CompressionPlugin({
asset: '[path].gz[query]',
algorithm: 'gzip',
test: /\.js$|\.css$|\.html$|\.eot?.+$|\.ttf?.+$|\.woff?.+$|\.svg?.+$/,
threshold: 10240,
minRatio: 0.8
})
],
module: {
rules: [
{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader',
options: {
presets: ['env', 'react', 'es2015'],
plugins: ["transform-es2015-arrow-functions"]
}
},
include: sourcePath
},
{
test: /\.css$/,
exclude: /node_modules/,
use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: [
{ loader: 'css-loader', options: { minimize: true } },
'postcss-loader',
'sass-loader'
]
})
},
{
test: /\.(eot?.+|svg?.+|ttf?.+|otf?.+|woff?.+|woff2?.+)$/,
use: 'file-loader?name=assets/[name]-[hash].[ext]'
},
{
test: /\.(png|gif|jpg|svg)$/,
use: [
'url-loader?limit=20480&name=assets/[name]-[hash].[ext]'
],
include: staticSourcePath
}
]
}
};
Here additionally I've added the es2015 to presets: ['env', 'react', 'es2015'] and plugins: ["transform-es2015-arrow-functions"] but it made no sense.
Well in case when the babel loader won't work at all of misconfiguration or something else, I think that the whole application won't start. I believe that something should be done with presets or their order... Need advice from experienced developer
UPDATE
I've changed devtool to inline-cheap-module-source-map and got error point to overlay.js -> const ansiHTML = require('ansi-html');
In your package.json file
change the version of webpack-dev-server to version "2.7.1" (or earlier).
"webpack-dev-server": "2.7.1"
Then do a npm install et voilà.
That solved the problem for me.
All versions after 2.7.1 gives me an error similar to yours.
Simply add devtools : "source-map" to your Webpack config like this:
const path = require('path');
module.exports = {
devtool: "source-map",
entry: ['babel-polyfill', path.resolve(__dirname, './js/main.js')],
mode: 'production',
output: {
path: __dirname+'/js/',
filename: 'main-webpack.js'
}
};
This will remove eval and change your source map to be supported by IE.
UPDATE I've changed devtool to inline-cheap-module-source-map and got error point to overlay.js -> const ansiHTML = require('ansi-html');
And to support ES6 syntax you have to compile your JavaScript code with Babel.
I am recently learning React and have problem setting webpack. I wrote a background image in sass file but I can't see this image in browser, I checked the develope tool and saw a strange file name as the attatched picture shows. There's no error when I run webpack. I think I might set the webpack.config.js incorrectly. Can somebody take a look for me? here's the source code:
var path = require('path');
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
module.exports = {
entry: [
'eventsource-polyfill',
'./src/index'
],
output: {
path: path.join(__dirname, 'dist'),
filename: 'bundle.js',
publicPath: '/'
},
module: {
loaders: [
{
test: /.jsx?$/,
loader: 'babel-loader',
exclude: /node_modules/,
query: {
presets: ['es2015', 'react']
}
},
{
test: /\.sass$/,
loader: 'style!css?sourceMap!sass'
},
{
test: /\.(jpg|gif|png)$/,
loader: "file"
},
{
test: /\.(jpg|gif|png)$/,
loader: "url"
}
]
},
plugins: [
new HtmlWebpackPlugin({
template: path.join(__dirname, 'src', 'index.html'),
filename: 'index.html',
inject: 'body',
})
]
};
I also put my files on github: https://github.com/john650914/ReactQuestion.git
Thank you very much~~~~~~~~~
Webpack will start looking for your url path at '/' which was set by your publicPath in your webpack.config.js
Looking at your repository with your link provided:
https://github.com/john650914/ReactQuestion.git
It seems like your image isn't in your projects root. You should specify the correct publicPath that leads to where you store your assets. So for example if you stored your images in /src/assets/ then your publicPath should be ./src/assets/ like this:
output: {
path: path.join(__dirname, 'dist'),
filename: 'bundle.js',
publicPath: './src/assets/'
},