问题
I'm trying to use AOT in Angular 2 using webpack and @ngtools/webpack.
I don't have any error with the compilation, but when I open the site on the browser I get a console error:
No NgModule metadata found for 'AppModule'
My AotPlugin on webpack configuration is this:
new AotPlugin({
tsConfigPath: 'tsconfig.json',
entryModule: helpers.root('src/app/app.module.ts#AppModule')
})
My app.module.ts is:
@NgModule({
bootstrap: [ App ],
imports: [ // import Angular's modules
BrowserModule,
RouterModule.forRoot(ROUTES),
SharedModule
],
declarations: [
App,
HomeComponent,
],
providers: providers
})
export class AppModule {}
and my main.browser.ts:
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from "./app/app.module";
const platform = platformBrowserDynamic();
platform.bootstrapModule(AppModule);
My tsconfig.json:
{
"compilerOptions": {
"target": "es5",
"module": "commonjs",
"moduleResolution": "node",
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"allowSyntheticDefaultImports": true,
"sourceMap": true,
"noEmitHelpers": true,
"removeComments": true,
"lib": ["es6", "dom"],
"strictNullChecks": false,
"baseUrl": "./src",
"paths": [],
"types": [
"hammerjs",
"jasmine",
"node",
"protractor",
"selenium-webdriver",
"source-map",
"webpack"
]
},
"exclude": [
"node_modules",
"dist"
],
"awesomeTypescriptLoaderOptions": {
"forkChecker": true,
"useWebpackText": true
},
"compileOnSave": false,
"buildOnSave": false,
"atom": { "rewriteTsconfig": false },
"angularCompilerOptions": {
"genDir": "dist",
"entryModule": "src/app/app.module#AppModule"
}
}
Webpack.config.js:
switch (process.env.NODE_ENV) {
case 'prod':
case 'production':
module.exports = require('./config/webpack.prod')({env: 'production'});
break;
case 'test':
case 'testing':
module.exports = require('./config/webpack.test')({env: 'test'});
break;
case 'dev':
case 'development':
default:
module.exports = require('./config/webpack.dev')({env: 'development'});
}
My /config/webpack.prod.js:
const webpack = require('webpack');
const helpers = require('./helpers');
const webpackMerge = require('webpack-merge'); // used to merge webpack configs
const commonConfig = require('./webpack.common.js').config; // the settings that are common to prod and dev
const hashName = require('./random-hash.js')(); // the settings that are common to prod and dev
/**
* Webpack Plugins
*/
const ProvidePlugin = require('webpack/lib/ProvidePlugin');
const DefinePlugin = require('webpack/lib/DefinePlugin');
const NormalModuleReplacementPlugin = require('webpack/lib/NormalModuleReplacementPlugin');
const IgnorePlugin = require('webpack/lib/IgnorePlugin');
const DedupePlugin = require('webpack/lib/optimize/DedupePlugin');
const UglifyJsPlugin = require('webpack/lib/optimize/UglifyJsPlugin');
/**
* Webpack Constants
*/
const ENV = process.env.NODE_ENV = process.env.ENV = 'production';
const HOST = process.env.HOST || 'localhost';
const PORT = process.env.PORT || 8080;
const METADATA = webpackMerge(require('./webpack.common.js').metadata, {
host: HOST,
port: PORT,
ENV: ENV
});
module.exports = function (env) {
return webpackMerge(commonConfig({ env: ENV }), {
devtool: 'hidden-source-map',
output:{
path: helpers.root('dist'),
filename: '[name].bundle.js?ver='+ hashName,
sourceMapFilename: '../maps/' + '[name].map?ver='+ hashName,
chunkFilename: '[id].chunk.js?ver='+ hashName
},
plugins: [
// NOTE: when adding more properties make sure you include them in custom-typings.d.ts
new DefinePlugin({
'ENV': JSON.stringify(METADATA.ENV),
'process.env': {
'ENV': JSON.stringify(METADATA.ENV),
'NODE_ENV': JSON.stringify(METADATA.ENV)
}
}),
new webpack.LoaderOptionsPlugin({
optons: {
debug: false,
htmlLoader: {
minimize: true,
removeAttributeQuotes: false,
caseSensitive: true,
customAttrSurround: [
[/#/, /(?:)/],
[/\*/, /(?:)/],
[/\[?\(?/, /(?:)/]
],
customAttrAssign: [/\)?\]?=/]
},
tslint: {
emitErrors: true,
failOnHint: true,
resourcePath: 'src'
},
postLoaders: [
{
test: /\.js$/,
loader: 'string-replace-loader',
query: {
search: 'var sourceMappingUrl = extractSourceMappingUrl\\(cssText\\);',
replace: 'var sourceMappingUrl = "";',
flags: 'g'
}
}
],
preLoaders: [
{
test: /\.ts$/,
loader: 'string-replace-loader',
query: {
search: '(System|SystemJS)(.*[\\n\\r]\\s*\\.|\\.)import\\((.+)\\)',
replace: '$1.import($3).then(mod => (mod.__esModule && mod.default) ? mod.default : mod)',
flags: 'g'
},
include: [helpers.root('src')]
},
{
test: /\.ts$/,
loader: 'tslint-loader',
options: {
configFile: 'tslint.json'
},
exclude: [/\.(spec|e2e)\.ts$/]
}
]
}
})
],
node: {
global: true,
crypto: 'empty',
process: false,
module: false,
clearImmediate: false,
setImmediate: false
}
});
};
And config/webpack.common.js:
const webpack = require('webpack');
const helpers = require('./helpers');
/*
* Webpack Plugins
*/
// problem with copy-webpack-plugin
const CopyWebpackPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ForkCheckerPlugin = require('awesome-typescript-loader').ForkCheckerPlugin;
const HtmlElementsPlugin = require('./html-elements-plugin');
const AssetsPlugin = require('assets-webpack-plugin');
const ContextReplacementPlugin = require('webpack/lib/ContextReplacementPlugin');
const AotPlugin = require('@ngtools/webpack').AotPlugin;
/*
* Webpack Constants
*/
/*
* Static metadata for index.html
*
* See: (custom attribute)
*/
const METADATA = {
title: '',
baseUrl: '/',
isDevServer: helpers.isWebpackDevServer()
};
/*
* Webpack configuration
*
* See: http://webpack.github.io/docs/configuration.html#cli
*/
module.exports = {
metadata: METADATA,
config: function(options) {
isProd = options.env === 'production';
return {
/*
* Cache generated modules and chunks to improve performance for multiple incremental builds.
* This is enabled by default in watch mode.
* You can pass false to disable it.
*
* See: http://webpack.github.io/docs/configuration.html#cache
*/
//cache: false,
/*
* The entry point for the bundle
* Our Angular.js app
*
* See: http://webpack.github.io/docs/configuration.html#entry
*/
entry: {
'polyfills': './src/polyfills.browser.ts',
'vendor': './src/vendor.browser.ts',
'main': './src/main.browser.ts'
},
// output: {
// // Make sure to use [name] or [id] in output.filename
// // when using multiple entry points
// // filename: "[name].bundle.js",
// // chunkFilename: "[id].bundle.js"
// publicPath: "https://d3ohoc4mai6ihm.cloudfront.net"
// },
/*
* Options affecting the resolving of modules.
*
* See: http://webpack.github.io/docs/configuration.html#resolve
*/
resolve: {
/*
* An array of extensions that should be used to resolve modules.
*
* See: http://webpack.github.io/docs/configuration.html#resolve-extensions
*/
extensions: ['.ts', '.js', '.json'],
// An array of directory names to be resolved to the current directory
modules: [helpers.root('src'), 'node_modules'],
},
/*
* Options affecting the normal modules.
*
* See: http://webpack.github.io/docs/configuration.html#module
*/
module: {
/*
* An array of automatically applied loaders.
*
* IMPORTANT: The loaders here are resolved relative to the resource which they are applied to.
* This means they are not resolved relative to the configuration file.
*
* See: http://webpack.github.io/docs/configuration.html#module-loaders
*/
loaders: [
/* Ahead of time plugin */
{
test: /\.ts$/,
loader: '@ngtools/webpack',
},
/*
* Json loader support for *.json files.
*
* See: https://github.com/webpack/json-loader
*/
{
test: /\.json$/,
loader: 'json-loader'
},
/*
* to string and css loader support for *.css files
* Returns file content as string
*
*/
{
test: /\.css$/,
loaders: ['to-string-loader', 'css-loader']
},
/* Raw loader support for *.html
* Returns file content as string
*
* See: https://github.com/webpack/raw-loader
*/
{
test: /\.html$/,
loader: 'raw-loader',
exclude: [helpers.root('src/index.html')]
},
/* File loader for supporting images, for example, in CSS files.
*/
{
test: /\.(jpg|png|gif)$/,
loader: 'url-loader?limit=100000000000'
},
// Support for SCSS as raw text
{
test: /\.scss$/,
loaders: ['raw-loader', 'sass-loader']
},
//{ test: /\.scss$/, loaders: ['style', 'css', 'postcss', 'sass'] },
{test: /\.(woff2?|ttf|eot|svg)$/, loader: 'url-loader?limit=100000000000'}
],
},
/*
* Add additional plugins to the compiler.
*
* See: http://webpack.github.io/docs/configuration.html#plugins
*/
plugins: [
new AssetsPlugin({
path: helpers.root('dist'),
filename: 'webpack-assets.json',
prettyPrint: true
}),
/*
* Plugin: ForkCheckerPlugin
* Description: Do type checking in a separate process, so webpack don't need to wait.
*
* See: https://github.com/s-panferov/awesome-typescript-loader#forkchecker-boolean-defaultfalse
*/
new ForkCheckerPlugin(),
/*
* Plugin: CommonsChunkPlugin
* Description: Shares common code between the pages.
* It identifies common modules and put them into a commons chunk.
*
* See: https://webpack.github.io/docs/list-of-plugins.html#commonschunkplugin
* See: https://github.com/webpack/docs/wiki/optimization#multi-page-app
*/
new webpack.optimize.CommonsChunkPlugin({
name: ['polyfills', 'vendor'].reverse()
}),
/**
* Plugin: ContextReplacementPlugin
* Description: Provides context to Angular's use of System.import
*
* See: https://webpack.github.io/docs/list-of-plugins.html#contextreplacementplugin
* See: https://github.com/angular/angular/issues/11580
*/
new ContextReplacementPlugin(
// The (\\|\/) piece accounts for path separators in *nix and Windows
/angular(\\|\/)core(\\|\/)(esm(\\|\/)src|src)(\\|\/)linker/,
helpers.root('src') // location of your src
),
new ContextReplacementPlugin(
// The (\\|\/) piece accounts for path separators in *nix and Windows
/moment[\/\\]locale$/, /en-gb/
),
/*
* Plugin: CopyWebpackPlugin
* Description: Copy files and directories in webpack.
*
* Copies project static assets.
*
* See: https://www.npmjs.com/package/copy-webpack-plugin
*/
new CopyWebpackPlugin([{
from: 'src/assets',
to: 'assets'
}]),
/*
* Plugin: HtmlWebpackPlugin
* Description: Simplifies creation of HTML files to serve your webpack bundles.
* This is especially useful for webpack bundles that include a hash in the filename
* which changes every compilation.
*
* See: https://github.com/ampedandwired/html-webpack-plugin
*/
new HtmlWebpackPlugin({
template: 'src/index.html',
chunksSortMode: 'dependency'
}),
/*
* Plugin: HtmlHeadConfigPlugin
* Description: Generate html tags based on javascript maps.
*
* If a publicPath is set in the webpack output configuration, it will be automatically added to
* href attributes, you can disable that by adding a "=href": false property.
* You can also enable it to other attribute by settings "=attName": true.
*
* The configuration supplied is map between a location (key) and an element definition object (value)
* The location (key) is then exported to the template under then htmlElements property in webpack configuration.
*
* Example:
* Adding this plugin configuration
* new HtmlElementsPlugin({
* headTags: { ... }
* })
*
* Means we can use it in the template like this:
* <%= webpackConfig.htmlElements.headTags %>
*
* Dependencies: HtmlWebpackPlugin
*/
new HtmlElementsPlugin({
headTags: require('./head-config.common')
}),
/* Ahead of time compilation plugin */
new AotPlugin({
tsConfigPath: 'tsconfig.json',
entryModule: helpers.root('src', 'app', 'app.module.ts#AppModule')
})
],
/*
* Include polyfills or mocks for various node stuff
* Description: Node configuration
*
* See: https://webpack.github.io/docs/configuration.html#node
*/
node: {
global: 'window',
crypto: 'empty',
process: true,
module: false,
clearImmediate: false,
setImmediate: false
}
};
}
}
Complete error trace:
Uncaught Error: No NgModule metadata found for 'AppModule'.
at NgModuleResolver.resolve (vendor.bundle.js?ver=d1084b5…:18969) [<root>]
at CompileMetadataResolver.getNgModuleMetadata (vendor.bundle.js?ver=d1084b5…:18172) [<root>]
at JitCompiler._loadModules (vendor.bundle.js?ver=d1084b5…:50582) [<root>]
at JitCompiler._compileModuleAndComponents (vendor.bundle.js?ver=d1084b5…:50542) [<root>]
at JitCompiler.compileModuleAsync (vendor.bundle.js?ver=d1084b5…:50508) [<root>]
at PlatformRef_._bootstrapModuleWithZone (vendor.bundle.js?ver=d1084b5…:39236) [<root>]
at PlatformRef_.bootstrapModule (vendor.bundle.js?ver=d1084b5…:39211) [<root>]
at Object.<anonymous> (main.bundle.js?ver=d1084b5…:34315) [<root>]
at __webpack_require__ (polyfills.bundle.js?ver=d1084b5…:53) [<root>]
at webpackJsonpCallback (polyfills.bundle.js?ver=d1084b5…:24) [<root>]
at :8080/main.bundle.js?ver=d1084b5dbd73943cc778978401608960:1:1 [<root>]
I don't really know what's going on. I really appreciate your time and you help.
回答1:
I don't really know if it helps, but I had similar problem. I'm guessing you are using some kind of boilerplate because you have this helpers.root function.
First of all try to change this part:
new AotPlugin({
tsConfigPath: 'tsconfig.json',
entryModule: helpers.root('src/app/app.module.ts#AppModule')
})
to this (adding helpers.root part to tsconfig.json file):
new AotPlugin({
tsConfigPath: helpers.root('tsconfig.json'),
entryModule: helpers.root('src/app/app.module.ts#AppModule')
})
Second of all double check your tsconfig.json to be configured to AoT compilation. This is my tsconfig-aot.json which I',m using in one of my Angular 2 projects:
{
"compilerOptions": {
"target": "es5",
"module": "commonjs",
"moduleResolution": "node",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"lib": ["es2015", "dom"],
"noImplicitAny": false,
"sourceRoot": ".",
"suppressImplicitAnyIndexErrors": true,
"typeRoots": [
"node_modules/@types"
]
},
"awesomeTypescriptLoaderOptions": {
"useWebpackText": true,
"forkChecker": true,
"useCache": true
},
"angularCompilerOptions": {
"genDir": "aot",
"skipMetadataEmit" : true
}
}
Hope this will help!
回答2:
Try rolling back to ngtools/webpack version 1.2.4 there are issues with the path resolution in later versions related to this issue 5329.
来源：https://stackoverflow.com/questions/42651383/angular-2-ngtools-webpack-aot