【发布时间】：2018-04-23 03:24:45
【问题描述】：
我正在使用带有 .NET Core 2.0 的 Visual Studio 2017 Angular 模板。该模板有许多我更新的旧依赖项，包括 Angular 5.0.0。使用 Bootstrap 3.x.x 运行 vanilla 模板可以工作。但是，使用 Bootstrap 4.0.0-beta.2 会导致以下错误：
Uncaught ReferenceError: Popper is not defined
我已尽我所能遵循此处的说明：
http://getbootstrap.com/docs/4.0/getting-started/webpack/
我看过这个问题：
Bootstrap 4: Uncaught ReferenceError: Popper is not defined
根据那里列出的解决方案，我必须在引导之前注册 popper，或者使用最小版本的 boostrap，因为它已经带有 popper。但是，我正在使用 webpack 2.5.1（我刚刚学习），我不知道如何在作为一部分提供的 webpack.config.js 文件中实现这两种解决方案模板，并包含 boostrap-webpack 文档所调用的修改。
webpack.config.js
const path = require('path');
const webpack = require('webpack');
const merge = require('webpack-merge');
const AotPlugin = require('@ngtools/webpack').AotPlugin;
const CheckerPlugin = require('awesome-typescript-loader').CheckerPlugin;
module.exports = (env) => {
// Configuration in common to both client-side and server-side bundles
const isDevBuild = !(env && env.prod);
const sharedConfig = {
stats: { modules: false },
context: __dirname,
resolve: { extensions: ['.js', '.ts'] },
output: {
filename: '[name].js',
publicPath: 'dist/' // Webpack dev middleware, if enabled, handles requests for this URL prefix
},
module: {
rules: [
{ test: /\.ts$/, include: /ClientApp/, use: isDevBuild ? ['awesome-typescript-loader?silent=true', 'angular2-template-loader'] : '@ngtools/webpack' },
{ test: /\.html$/, use: 'html-loader?minimize=false' },
{ test: /\.css$/, use: ['to-string-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize'] },
{ test: /\.(png|jpg|jpeg|gif|svg)$/, use: 'url-loader?limit=25000' }
]
},
plugins: [new CheckerPlugin()]
};
// Configuration for client-side bundle suitable for running in browsers
const clientBundleOutputDir = './wwwroot/dist';
const clientBundleConfig = merge(sharedConfig, {
entry: { 'main-client': './ClientApp/boot.browser.ts' },
output: { path: path.join(__dirname, clientBundleOutputDir) },
plugins: [
new webpack.DllReferencePlugin({
context: __dirname,
manifest: require('./wwwroot/dist/vendor-manifest.json')
}),
new webpack.ProvidePlugin({
$: 'jquery',
jQuery: 'jquery',
'window.jQuery': 'jquery',
Popper: ['popper.js', 'default'],
// In case you imported plugins individually, you must also require them here:
//Util: "exports-loader?Util!bootstrap/js/dist/util",
//Dropdown: "exports-loader?Dropdown!bootstrap/js/dist/dropdown"
})
].concat(isDevBuild ? [
// Plugins that apply in development builds only
new webpack.SourceMapDevToolPlugin({
filename: '[file].map', // Remove this line if you prefer inline source maps
moduleFilenameTemplate: path.relative(clientBundleOutputDir, '[resourcePath]') // Point sourcemap entries to the original file locations on disk
})
] : [
// Plugins that apply in production builds only
new webpack.optimize.UglifyJsPlugin(),
new AotPlugin({
tsConfigPath: './tsconfig.json',
entryModule: path.join(__dirname, 'ClientApp/app/app.module.browser#AppModule'),
exclude: ['./**/*.server.ts']
})
])
});
// Configuration for server-side (prerendering) bundle suitable for running in Node
const serverBundleConfig = merge(sharedConfig, {
resolve: { mainFields: ['main'] },
entry: { 'main-server': './ClientApp/boot.server.ts' },
plugins: [
new webpack.DllReferencePlugin({
context: __dirname,
manifest: require('./ClientApp/dist/vendor-manifest.json'),
sourceType: 'commonjs2',
name: './vendor'
})
].concat(isDevBuild ? [] : [
// Plugins that apply in production builds only
new AotPlugin({
tsConfigPath: './tsconfig.json',
entryModule: path.join(__dirname, 'ClientApp/app/app.module.server#AppModule'),
exclude: ['./**/*.browser.ts']
})
]),
output: {
libraryTarget: 'commonjs',
path: path.join(__dirname, './ClientApp/dist')
},
target: 'node',
devtool: 'inline-source-map'
});
return [clientBundleConfig, serverBundleConfig];
};
此外，这里是作为模板一部分提供的主入口点文件 boot.browser.ts：
import 'reflect-metadata';
import 'zone.js';
import 'bootstrap';
import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module.browser';
if (module.hot) {
module.hot.accept();
module.hot.dispose(() => {
// Before restarting the app, we create a new root element and dispose the old one
const oldRootElem = document.querySelector('app');
const newRootElem = document.createElement('app');
oldRootElem!.parentNode!.insertBefore(newRootElem, oldRootElem);
modulePromise.then(appModule => appModule.destroy());
});
} else {
enableProdMode();
}
// Note: @ng-tools/webpack looks for the following expression when performing production
// builds. Don't change how this line looks, otherwise you may break tree-shaking.
const modulePromise = platformBrowserDynamic().bootstrapModule(AppModule);
【问题讨论】：
标签： twitter-bootstrap angular webpack visual-studio-2017 asp.net-core-2.0