ERROR in vendor.js from UglifyJs - Unexpected token: name (b) [vendor.js #604

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fergalmoran · 2025-08-09T17:16:56Z

fergalmoran commented

2025-08-09 17:16:56 +00:00

Originally created by @aherrick on 7/7/2017

We are seeing the following error when doing a Production build in VSTS.

Any thoughts?

      ERROR in vendor.js from UglifyJs
      Unexpected token: name (b) [vendor.js:83792,5]

This is from the base webpack configuration in the Angular template.

Below is the file in question:

const path = require('path');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const merge = require('webpack-merge');

module.exports = (env) => {
    const extractCSS = new ExtractTextPlugin('vendor.css');
    const isDevBuild = !(env && env.prod);
    const sharedConfig = {
        stats: { modules: false },
        resolve: { extensions: [ '.js' ] },
        module: {
            rules: [
                { test: /\.(png|woff|woff2|eot|ttf|svg)(\?|$)/, use: 'url-loader?limit=100000' }
            ]
        },
        entry: {
            vendor: [
                '@angular/animations',
                '@angular/common',
                '@angular/compiler',
                '@angular/core',
                '@angular/forms',
                '@angular/http',
                '@angular/platform-browser',
                '@angular/platform-browser-dynamic',
                '@angular/router',
                'bootstrap',
                'bootstrap/dist/css/bootstrap.css',
                'es6-shim',
                'es6-promise',
                'event-source-polyfill',
                'flot',
                'jquery',
                'zone.js',
                'ng2-completer',
                'sweetalert2',
                'sweetalert2/dist/sweetalert2.css',
                'ng2-file-upload',
                'angular-router-loader'
            ]
        },
        output: {
            publicPath: '/dist/',
            filename: '[name].js',
            library: '[name]_[hash]'
        },
        plugins: [
            new webpack.ProvidePlugin({ $: 'jquery', jQuery: 'jquery' }), // Maps these identifiers to the jQuery package (because Bootstrap expects it to be a global variable)
            new webpack.ContextReplacementPlugin(/\@angular\b.*\b(bundles|linker)/, path.join(__dirname, './ClientApp')), // Workaround for https://github.com/angular/angular/issues/11580
            new webpack.ContextReplacementPlugin(/angular(\\|\/)core(\\|\/)@angular/, path.join(__dirname, './ClientApp')), // Workaround for https://github.com/angular/angular/issues/14898
            new webpack.IgnorePlugin(/^vertx$/) // Workaround for https://github.com/stefanpenner/es6-promise/issues/100
        ]
    };

    const clientBundleConfig = merge(sharedConfig, {
        output: { path: path.join(__dirname, 'wwwroot', 'dist') },
        module: {
            rules: [
                { test: /\.css(\?|$)/, use: extractCSS.extract({ use: isDevBuild ? 'css-loader' : 'css-loader?minimize' }) }
            ]
        },
        plugins: [
            extractCSS,
            new webpack.DllPlugin({
                path: path.join(__dirname, 'wwwroot', 'dist', '[name]-manifest.json'),
                name: '[name]_[hash]'
            })
        ].concat(isDevBuild ? [] : [
            new webpack.optimize.UglifyJsPlugin()
        ])
    });

    const serverBundleConfig = merge(sharedConfig, {
        target: 'node',
        resolve: { mainFields: ['main'] },
        output: {
            path: path.join(__dirname, 'ClientApp', 'dist'),
            libraryTarget: 'commonjs2',
        },
        module: {
            rules: [ { test: /\.css(\?|$)/, use: ['to-string-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize' ] } ]
        },
        entry: { vendor: ['aspnet-prerendering'] },
        plugins: [
            new webpack.DllPlugin({
                path: path.join(__dirname, 'ClientApp', 'dist', '[name]-manifest.json'),
                name: '[name]_[hash]'
            })
        ]
    });

    return [clientBundleConfig, serverBundleConfig];
}

*Originally created by @aherrick on 7/7/2017* We are seeing the following error when doing a Production build in VSTS. Any thoughts? ``` ERROR in vendor.js from UglifyJs Unexpected token: name (b) [vendor.js:83792,5] ``` This is from the base `webpack` configuration in the Angular template. Below is the file in question: ``` const path = require('path'); const webpack = require('webpack'); const ExtractTextPlugin = require('extract-text-webpack-plugin'); const merge = require('webpack-merge'); module.exports = (env) => { const extractCSS = new ExtractTextPlugin('vendor.css'); const isDevBuild = !(env && env.prod); const sharedConfig = { stats: { modules: false }, resolve: { extensions: [ '.js' ] }, module: { rules: [ { test: /\.(png|woff|woff2|eot|ttf|svg)(\?|$)/, use: 'url-loader?limit=100000' } ] }, entry: { vendor: [ '@angular/animations', '@angular/common', '@angular/compiler', '@angular/core', '@angular/forms', '@angular/http', '@angular/platform-browser', '@angular/platform-browser-dynamic', '@angular/router', 'bootstrap', 'bootstrap/dist/css/bootstrap.css', 'es6-shim', 'es6-promise', 'event-source-polyfill', 'flot', 'jquery', 'zone.js', 'ng2-completer', 'sweetalert2', 'sweetalert2/dist/sweetalert2.css', 'ng2-file-upload', 'angular-router-loader' ] }, output: { publicPath: '/dist/', filename: '[name].js', library: '[name]_[hash]' }, plugins: [ new webpack.ProvidePlugin({ $: 'jquery', jQuery: 'jquery' }), // Maps these identifiers to the jQuery package (because Bootstrap expects it to be a global variable) new webpack.ContextReplacementPlugin(/\@angular\b.*\b(bundles|linker)/, path.join(__dirname, './ClientApp')), // Workaround for https://github.com/angular/angular/issues/11580 new webpack.ContextReplacementPlugin(/angular(\\|\/)core(\\|\/)@angular/, path.join(__dirname, './ClientApp')), // Workaround for https://github.com/angular/angular/issues/14898 new webpack.IgnorePlugin(/^vertx$/) // Workaround for https://github.com/stefanpenner/es6-promise/issues/100 ] }; const clientBundleConfig = merge(sharedConfig, { output: { path: path.join(__dirname, 'wwwroot', 'dist') }, module: { rules: [ { test: /\.css(\?|$)/, use: extractCSS.extract({ use: isDevBuild ? 'css-loader' : 'css-loader?minimize' }) } ] }, plugins: [ extractCSS, new webpack.DllPlugin({ path: path.join(__dirname, 'wwwroot', 'dist', '[name]-manifest.json'), name: '[name]_[hash]' }) ].concat(isDevBuild ? [] : [ new webpack.optimize.UglifyJsPlugin() ]) }); const serverBundleConfig = merge(sharedConfig, { target: 'node', resolve: { mainFields: ['main'] }, output: { path: path.join(__dirname, 'ClientApp', 'dist'), libraryTarget: 'commonjs2', }, module: { rules: [ { test: /\.css(\?|$)/, use: ['to-string-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize' ] } ] }, entry: { vendor: ['aspnet-prerendering'] }, plugins: [ new webpack.DllPlugin({ path: path.join(__dirname, 'ClientApp', 'dist', '[name]-manifest.json'), name: '[name]_[hash]' }) ] }); return [clientBundleConfig, serverBundleConfig]; } ```

fergalmoran closed this issue

2025-08-09 17:16:56 +00:00

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Reference: github/JavaScriptServices#604