How to configure Webpack to not pull content of imported Sass files to a source map? - node.js

Question

I have a Sass file that imports Bootstrap and Font Awesome.
They has been put on the of the file before my custom CSS class.
Here is the code:
/src/scss/site.scss
#import "~bootstrap/scss/bootstrap";
#import "~font-awesome/scss/font-awesome";
// Custom style sheet here
.my-custom-header{
color:#F00
}
There is a source map after Webpack build but it includes the content of Bootstrap and font awesome.
Here what is look like in Browser:
When I tried to inspect a custom class it point to correct line number of origin source code but incorrect for generated source map because it has content of Bootstrap in the top.
My question is:
Is it possible to configure a output source map to keep the import statement and the content is exact the same as actual source code.
Here what source map I'm expected.
site.css.map
#import "~bootstrap/scss/bootstrap";
#import "~font-awesome/scss/font-awesome";
// Custom style sheet here
.my-custom-header{
color:#F00
}
Here my Webpack configuration:
const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const siteFile = [__dirname, 'src', 'scss', 'site'];
const outputPath = [__dirname, 'public', 'css'];
module.exports = {
entry: {
site: path.resolve(...siteFile),
},
output: {
path: path.resolve(...outputPath),
},
resolve: {
// https://github.com/webpack/webpack-dev-server/issues/720#issuecomment-268470989
extensions: ['.scss']
},
devtool: 'source-map',
module: {
rules: [
{
test: /\.scss$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
},
{
loader: 'css-loader', // Translates CSS into CommonJS modules
options: {
sourceMap: true
}
},
{
loader: 'postcss-loader', // Run post css actions
options: {
plugins: () => {
// post css plugins, can be exported to postcss.config.js
return [
require('precss'),
require('autoprefixer')
];
},
sourceMap: true
}
},
{
loader: 'resolve-url-loader',
},
{
loader: 'sass-loader', // Compiles Sass to CSS, using node-sass by default
options: {
sourceMap: true
}
}
],
exclude: /node_modules/
},
{
test: /\.(png|jpe?g|gif|svg|eot|ttf|woff2?)$/,
use: [
{
loader: 'file-loader',
options: {
name: '[name].[ext]',
outputPath: '.' //relative to output
}
}
]
}
]
},
plugins: [
new MiniCssExtractPlugin({
filename: './[name].css' // relative to output
}),
],
devServer: {
contentBase: path.join(__dirname, 'public'),
compress: false,
port: 8080,
}
};
Here is a link to a repository of the example code.
codesanook-examples-webpack
Thank you.

Answer 1

Have you tried SourceMapDevToolPlugin?
https://webpack.js.org/plugins/source-map-dev-tool-plugin/
You might need to create a vendor bundle for node modules stuff then you can ignore it from sourcemap.