我在 app.module 的 Chrome 开发者控制台中找不到 404 .js因为尝试解析的 URL,在第一次输入要索引的 URL 后.html,如下所示,请注意 app.module 缺少.js扩展名:
http://localhost:8080/someTomcatContext/scripts/someAppName/src/app/app.module
以下是文件夹结构:
node_modules
package.json
styles.css
systemjs.config.extras.js
systemjs.config.js
systemjs-angular-loader.js
tslint.json
src
|-- app
| |-- app.component.ts
| |-- app.module.ts
| |-- app.routes.ts
|-- index.html
|-- main.ts
|-- tsconfig.json
我有以下系统配置.js
(function (global) {
System.config({
paths: {
// paths serve as alias
'npm:': '../node_modules/'
},
// map tells the System loader where to look for things
map: {
// our app is within the app folder
'app': 'src/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
'rxjs': 'npm:rxjs',
'angular-in-memory-web-api': 'npm:angular-in-memory-web-api/bundles/in-memory-web-api.umd.js'
},
// packages tells the System loader how to load when no filename and/or no extension
packages: {
app: {
defaultExtension: 'js',
meta: {
'./*.js': {
loader: 'systemjs-angular-loader.js'
}
}
},
rxjs: {
defaultExtension: 'js'
}
}
});
})(this);
我尝试使用以下两种变体更改通配符,以便在 system.config 中附加.js扩展名.js如上所示:
'./src/app/*.js'
'./app/*.js'
以下是索引的内容.html:
<!DOCTYPE html>
<html>
<head>
<title>Angular QuickStart</title>
<script>document.write('<base href="' + document.location + '" />');
</script>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../styles.css">
<!-- Polyfill(s) for older browsers -->
<script src="../node_modules/core-js/client/shim.min.js"></script>
<script src="../node_modules/zone.js/dist/zone.js"></script>
<script src="../node_modules/systemjs/dist/system.src.js"></script>
<script src="../systemjs.config.js"></script>
<script>
System.import('main.js').catch(function(err){ console.error(err); });
</script>
</head>
<body>
<my-app>Loading AppComponent content here ...</my-app>
</body>
</html>
以下是主要内容:
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module';
platformBrowserDynamic().bootstrapModule(AppModule);
2 应用程序升级到 Angular 4 应用程序,并使用快速入门项目 (https://github.com/angular/quickstart.git( 作为框架。
我将特定于应用程序的 TS 文件放在 src/app 文件夹中,并使用以下结构使其工作:
node_modules
package.json
tslint.json
src
|-- app
| |-- app.component.ts
| |-- app.module.ts
| |-- app.routes.ts
|-- index.html
|-- main.ts
|-- styles.css
|-- systemjs.config.extras.js
|-- systemjs.config.js
|-- systemjs-angular-loader.js
|-- tsconfig.json
我的 systemjs.config.js 看起来像这样:
/**
* System configuration for Angular samples
* Adjust as necessary for your application needs.
*/
(function (global) {
System.config({
paths: {
// paths serve as alias
'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
'rxjs': 'npm:rxjs',
'angular-in-memory-web-api': 'npm:angular-in-memory-web-api/bundles/in-memory-web-api.umd.js'
},
// packages tells the System loader how to load when no filename and/or no extension
packages: {
app: {
defaultExtension: 'js',
meta: {
'./*.js': {
loader: 'systemjs-angular-loader.js'
}
}
},
rxjs: {
defaultExtension: 'js'
}
}
});
})(this);
我的索引.html看起来像这样:
<!DOCTYPE html>
<html>
<head>
<title>Angular QuickStart</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="styles.css">
<!-- Polyfill(s) for older browsers -->
<script src="../node_modules/core-js/client/shim.min.js"></script>
<script src="../node_modules/zone.js/dist/zone.js"></script>
<script src="../node_modules/systemjs/dist/system.src.js"></script>
<script src="systemjs.config.js"></script>
<script>
System.import('main.js').catch(function(err){ console.error(err); });
</script>
</head>
<body>
<my-app>Loading AppComponent content here ...</my-app>
</body>
</html>
main.ts 看起来像这样:
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module';
platformBrowserDynamic().bootstrapModule(AppModule);
抱歉,这可能来得太晚了,但我希望它对其他人有所帮助。我在角度快速入门项目中遇到了同样的问题。事实证明,您需要在systemjs.config.js文件中向System.config添加一个defaultJSExtensions
标志,并将其设置为true。
System.config(
//paths and other settings...
defaultJSExtensions : true
)(this);
请参阅github上的问题 https://github.com/systemjs/systemjs/issues/812