Wepback No Source Mapping

webpack.config.js

var path = require('path');
var webpack = require('webpack');

module.exports = {
    entry: {
        'Dashboard/index': './src/Dashboard/index.js',
    },
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: '[name].js',
    },
    module: {
        rules: [
            { test: /\.(js)$/, use: 'babel-loader' },
            { test: /\.(jsx)$/, use: 'babel-loader' }
        ]
    },
    optimization: {
        splitChunks:{
            cacheGroups: {
                vendor: {
                    test: /react|react-dom|mobx|mobx-react|moment|axios/,
                    name: "vendor",
                    chunks: "all",
                    enforce: true
                }
            }
        }
    },
    mode: "development",
    plugins: [
        new webpack.SourceMapDevToolPlugin({
            filename: '[file].map',
            moduleFilenameTemplate: undefined,
            fallbackModuleFilenameTemplate: undefined,
            append: null,
            module: true,
            columns: true,
            lineToLine: false,
            noSources: false,
            namespace: '' 
        })
    ]
};