I'm new to webpack, and I need a hand in setting up to generate sourcemaps. I'm running webpack serve
from the command line, which compiles successfully. But I really need sourcemaps. This is my webpack.config.js
.
var webpack = require('webpack');
module.exports = {
output: {
filename: 'main.js',
publicPath: '/assets/'
},
cache: true,
debug: true,
devtool: true,
entry: [
'webpack/hot/only-dev-server',
'./src/components/main.js'
],
stats: {
colors: true,
reasons: true
},
resolve: {
extensions: ['', '.js', '.jsx'],
alias: {
'styles': __dirname + '/src/styles',
'mixins': __dirname + '/src/mixins',
'components': __dirname + '/src/components/',
'stores': __dirname + '/src/stores/',
'actions': __dirname + '/src/actions/'
}
},
module: {
preLoaders: [{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
loader: 'jsxhint'
}],
loaders: [{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
loader: 'react-hot!babel-loader'
}, {
test: /\.sass/,
loader: 'style-loader!css-loader!sass-loader?outputStyle=expanded&indentedSyntax'
}, {
test: /\.scss/,
loader: 'style-loader!css!sass'
}, {
test: /\.(png|jpg|woff|woff2)$/,
loader: 'url-loader?limit=8192'
}]
},
plugins: [
new webpack.HotModuleReplacementPlugin(),
new webpack.NoErrorsPlugin()
]
};
I'm really new to webpack, and looking though the docs hasn't really helped as I'm not sure what this problem is specific to.
This question is related to
javascript
webpack
build-process
babeljs
source-maps
Even same issue I faced, in browser it was showing compiled code. I have made below changes in webpack config file and it is working fine now.
devtool: '#inline-source-map',
debug: true,
and in loaders I kept babel-loader as first option
loaders: [
{
loader: "babel-loader",
include: [path.resolve(__dirname, "src")]
},
{ test: /\.js$/, exclude: [/app\/lib/, /node_modules/], loader: 'ng-annotate!babel' },
{ test: /\.html$/, loader: 'raw' },
{
test: /\.(jpe?g|png|gif|svg)$/i,
loaders: [
'file?hash=sha512&digest=hex&name=[hash].[ext]',
'image-webpack?bypassOnDebug&optimizationLevel=7&interlaced=false'
]
},
{test: /\.less$/, loader: "style!css!less"},
{ test: /\.styl$/, loader: 'style!css!stylus' },
{ test: /\.css$/, loader: 'style!css' }
]
On Webpack 2 I tried all 12 devtool options. The following options link to the original file in the console and preserve line numbers. See the note below re: lines only.
https://webpack.js.org/configuration/devtool
devtool best dev options
build rebuild quality look
eval-source-map slow pretty fast original source worst
inline-source-map slow slow original source medium
cheap-module-eval-source-map medium fast original source (lines only) worst
inline-cheap-module-source-map medium pretty slow original source (lines only) best
lines only
Source Maps are simplified to a single mapping per line. This usually means a single mapping per statement (assuming you author is this way). This prevents you from debugging execution on statement level and from settings breakpoints on columns of a line. Combining with minimizing is not possible as minimizers usually only emit a single line.
REVISITING THIS
On a large project I find ... eval-source-map rebuild time is ~3.5s ... inline-source-map rebuild time is ~7s
Minimal webpack config for jsx with sourcemaps:
var path = require('path');
var webpack = require('webpack');
module.exports = {
entry: `./src/index.jsx` ,
output: {
path: path.resolve(__dirname,"build"),
filename: "bundle.js"
},
devtool: 'eval-source-map',
module: {
loaders: [
{
test: /.jsx?$/,
loader: 'babel-loader',
exclude: /node_modules/,
query: {
presets: ['es2015', 'react']
}
}
]
},
};
Running it:
Jozsefs-MBP:react-webpack-babel joco$ webpack -d
Hash: c75d5fb365018ed3786b
Version: webpack 1.13.2
Time: 3826ms
Asset Size Chunks Chunk Names
bundle.js 1.5 MB 0 [emitted] main
bundle.js.map 1.72 MB 0 [emitted] main
+ 221 hidden modules
Jozsefs-MBP:react-webpack-babel joco$
If optimizing for dev + production, you could try something like this in your config:
const dev = process.env.NODE_ENV !== 'production'
// in config
{
devtool: dev ? 'eval-cheap-module-source-map' : 'source-map',
}
I am using webpack 2.1.0-beta.19
Maybe someone else has this problem at one point. If you use the UglifyJsPlugin
in webpack 2
you need to explicitly specify the sourceMap
flag. For example:
new webpack.optimize.UglifyJsPlugin({ sourceMap: true })
Source: Stackoverflow.com