javascript - 提前编译时出现 SystemJS 错误(NgZone 没有提供程序)

Question

之前成功使用过Angular的提前编译。现在我已经在我的应用程序中添加了路由和延迟加载，但我无法再让它工作了。

我已经更新我的代码以使用 2.0(最新)版本，并且当我即时编译时它运行良好。但是在提前编译时出现以下错误:

(index):52 Error: (SystemJS) XHR error (404 Not Found) loading https://127.0.0.1:3443/traceur.js Error: XHR error (404 Not Found) loading https://127.0.0.1:3443/traceur.js at XMLHttpRequest.wrapFn [as _onreadystatechange] (https://127.0.0.1:3443/node_modules/zone.js/dist/zone.js:647:29) at ZoneDelegate.invokeTask (https://127.0.0.1:3443/node_modules/zone.js/dist/zone.js:236:37) at Zone.runTask (https://127.0.0.1:3443/node_modules/zone.js/dist/zone.js:136:47) at XMLHttpRequest.ZoneTask.invoke (https://127.0.0.1:3443/node_modules/zone.js/dist/zone.js:304:33) Error loading https://127.0.0.1:3443/traceur.js Error loading https://127.0.0.1:3443/node_modules/@angular/core/src/linker/ng_module_factory.js as "@angular/core/src/linker/ng_module_factory" from https://127.0.0.1:3443/dist/app/app.module.ngfactory.js

查看app.module.ngfactory.js，有一堆类似于下面的导入:

...
var import0 = require('@angular/core/src/linker/ng_module_factory');
var import1 = require('./app.module');
var import2 = require('@angular/common/src/common_module');
var import3 = require('@angular/core/src/application_module');
var import4 = require('@angular/platform-browser/src/browser');
var import5 = require('@angular/forms/src/directives');
var import6 = require('@angular/forms/src/form_providers');
...

我注意到如果我改变

var import0 = require('@angular/core/src/linker/ng_module_factory');

到

import * as import0 from '@angular/core/src/linker/ng_module_factory';

SystemJS 接受这一行并为下一行触发相同的错误，即

var import1 = require('./app.module');

所以我一直试图让 SystemJS 识别这种 CommonJS 样式格式，但这只会导致其他错误，没有一个比上面的错误更清楚。

编辑:当我切换到在 tsconfig 中使用 es2015 模块并运行应用程序时，我收到(可怕的)traceur.js 错误:

https://127.0.0.1:3443/traceur.js Failed to load resource: the server responded with a status of 404 (Not Found) 2016-09-26 10:11:19.842 127.0.0.1/:52 Error: (SystemJS) XHR error (404 Not Found) loading https://127.0.0.1:3443/traceur.js Error: XHR error (404 Not Found) loading https://127.0.0.1:3443/traceur.js at XMLHttpRequest.wrapFn [as _onreadystatechange] (https://127.0.0.1:3443/node_modules/zone.js/dist/zone.js:647:29) at ZoneDelegate.invokeTask (https://127.0.0.1:3443/node_modules/zone.js/dist/zone.js:236:37) at Zone.runTask (https://127.0.0.1:3443/node_modules/zone.js/dist/zone.js:136:47) at XMLHttpRequest.ZoneTask.invoke (https://127.0.0.1:3443/node_modules/zone.js/dist/zone.js:304:33) Error loading https://127.0.0.1:3443/traceur.js Error loading https://127.0.0.1:3443/dist/app/main.js

我以前遇到过这个问题，并通过删除包含 import 语句的注释掉的代码解决了这个问题。这次我的代码中没有这样的行。

这是我的 systemjs.config.js:

(function(global) {
    System.defaultJSExtensions = true;
    System.defaultExtension = 'js';

    // map tells the System loader where to look for things
    // N.B. the dots at the start of the paths are very important!
    var map = {
        'app':                        './dist/app',
        '@angular':                   './node_modules/@angular',
        'rxjs':                       './node_modules/rxjs'
    };

    // packages tells the System loader how to load when no filename and/or no extension
    var packages = {
        'app':                        { main: 'main.js',  defaultExtension: 'js' },
        'rxjs':                       { defaultExtension: 'js' }
    };
    var ngPackageNames = [
        'common',
        'compiler',
        'compiler-cli',
        'core',
        'forms',
        'http',
        'platform-browser',
        'platform-browser-dynamic',
        'router',
        'tsc-wrapped',
        'upgrade'
    ];
    function packUmd(pkgName) {
        packages['@angular/'+pkgName] = { main: 'bundles/' + pkgName + '.umd.js', defaultExtension: 'js' };
    }
    var setPackageConfig =  packUmd;
    // Add package entries for angular packages
    ngPackageNames.forEach(setPackageConfig);
    console.log("SystemJS packages:", packages);
    var config = {
        map: map,
        packages: packages
    };

    System.config(config);

})(this);

编辑 2:当我在 systemjs.config.js 中将 'app' 的格式设置为 'cjs' 时，即

'app': { main: 'main.js',  defaultExtension: 'js', format: 'cjs' },

使用commonjs编译代码时，不再出现上面提到的app.module.ngfactory.js中的错误。

但是，当在浏览器中运行时，出现以下错误(在安装 traceur 之后；没有 traceur 我只是得到上面的 traceur 错误):

(index):52 Error: (SystemJS) No provider for NgZone! Error: No provider for NgZone! at NoProviderError.Error (native) at NoProviderError.BaseError [as constructor] (https://147.252.67.223:3443/node_modules/@angular/core/bundles/core.umd.js:1255:38) at NoProviderError.AbstractProviderError [as constructor] (https://147.252.67.223:3443/node_modules/@angular/core/bundles/core.umd.js:1739:20) at new NoProviderError (https://147.252.67.223:3443/node_modules/@angular/core/bundles/core.umd.js:1770:20) at ReflectiveInjector_._throwOrNull (https://147.252.67.223:3443/node_modules/@angular/core/bundles/core.umd.js:3366:23) at ReflectiveInjector_._getByKeyDefault (https://147.252.67.223:3443/node_modules/@angular/core/bundles/core.umd.js:3394:29) at ReflectiveInjector_._getByKey (https://147.252.67.223:3443/node_modules/@angular/core/bundles/core.umd.js:3357:29) at ReflectiveInjector_.get (https://147.252.67.223:3443/node_modules/@angular/core/bundles/core.umd.js:3166:25) at AppModuleInjector.createInternal (https://147.252.67.223:3443/dist/app/app.module.ngfactory.js:610:69) at AppModuleInjector.NgModuleInjector.create (https://147.252.67.223:3443/node_modules/@angular/core/src/linker/ng_module_factory.js!transpiled:96:32) Evaluating https://147.252.67.223:3443/dist/app/main.js Error loading https://147.252.67.223:3443/dist/app/main.js

我的 tsconfig.json:

{
    "compilerOptions": {
        "target": "es5",
        "module": "commonjs",
        "moduleResolution": "node",
        "sourceMap": true,
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "removeComments": true,
        "noImplicitAny": true,
        "suppressImplicitAnyIndexErrors": true,
        "rootDir":"./src",
        "outDir":"./dist"
    },
    "angularCompilerOptions": {
        "genDir": ".",
        "debug": true,
        "skipMetadataEmit": true
    }
}

非常感谢任何帮助。

Answer 1

由于 systemjs.config.js，我从 Angular RC6 切换到 2.0.0 时遇到了类似的问题。

我最终根据最新的快速入门指南重做了整个 systemjs.config.js:https://angular.io/docs/ts/latest/quickstart.html#!#add-config-files有一些修改。

我在您的 systemjs.config.js 中看到的一个问题是缺少对以下包的引用:

• es6-shim(或 core-js)
• 反射(reflect)元数据
• zone.js

以下是我的systemjs.config.js

(function (global) {
    System.config({
        paths: {
            'npm:': '/node_modules/'
        },
        // map tells the System loader where to look for things
        map: {
            // our app is within the app folder
            app: '/app',
            // angular bundles
            '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
            '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
            '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
            '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
            '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
            '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
            '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
            '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
            // other libraries
            'es6-shim': 'npm:es6-shim',
            'reflect-metadata': 'npm:reflect-metadata',
            'rxjs': 'npm:rxjs',
            'zone.js': 'npm:zone.js'
        },
        // packages tells the System loader how to load when no filename and/or no extension
        packages: {
            'app': { main: 'main.js', defaultExtension: 'js' },
            'es6-shim': { main: 'es6-shim.min.js', defaultExtension: 'js' },
            'reflect-metadata': { main: 'Reflect.js', defaultExtension: 'js' },
            'rxjs': { main: 'bundles/Rx.min.js', defaultExtension: 'js' },
            'zone.js': { main: 'dist/zone.min.js', defaultExtension: 'js' }
        }
    });
})(this);