Angular2打字稿应用抛出的组件404没有指定JS扩展时 [英] Angular2 Typescript app throws 404 on components when js extension not specified
问题描述
我刚开始玩弄Angular2，跑进一个奇怪的组件文件扩展名问题：
I just started to play around with Angular2, and ran into a weird component file extension problem:
让我们使用5分钟快速入门演示从angular.io （I'这里会重现code仅供参考）。
Let's use the 5 minutes quickstart demo from angular.io (I'll reproduce the code here for reference).
文件结构
angular2-quickstart
|- app
| |- app.component.ts
| |- boot.ts
|
|- index.html
|- package.json
|- tsconfig.json
的package.json
{
"name": "angular2-quickstart",
"version": "1.0.0",
"scripts": {
"tsc": "tsc",
"tsc:w": "tsc -w",
"lite": "lite-server",
"start": "concurrent \"npm run tsc:w\" \"npm run lite\" "
},
"license": "ISC",
"dependencies": {
"angular2": "2.0.0-beta.0",
"systemjs": "0.19.6",
"es6-promise": "^3.0.2",
"es6-shim": "^0.33.3",
"reflect-metadata": "0.1.2",
"rxjs": "5.0.0-beta.0",
"zone.js": "0.5.10"
},
"devDependencies": {
"concurrently": "^1.0.0",
"lite-server": "^1.3.1",
"typescript": "^1.7.3"
}
}
tsconfig.json
{
"compilerOptions": {
"target": "ES5",
"module": "system",
"moduleResolution": "node",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"removeComments": false,
"noImplicitAny": false
},
"exclude": [
"node_modules"
]
}
应用/ app.component.ts
import {Component} from 'angular2/core';
@Component({
selector: 'my-app',
template: '<h1>My First Angular 2 App</h1>'
})
export class AppComponent { }
应用/ boot.ts
import {bootstrap} from 'angular2/platform/browser'
import {AppComponent} from './app.component'
bootstrap(AppComponent);
的index.html
<html>
<head>
<title>Angular 2 QuickStart</title>
<!-- 1. Load libraries -->
<script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<script src="node_modules/rxjs/bundles/Rx.js"></script>
<script src="node_modules/angular2/bundles/angular2.dev.js"></script>
<!-- 2. Configure SystemJS -->
<script>
System.config({
packages: {
app: {
format: 'register',
defaultExtension: 'js'
}
}
});
System.import('app/boot')
.then(null, console.error.bind(console));
</script>
</head>
<!-- 3. Display the application -->
<body>
<my-app>Loading...</my-app>
</body>
</html>
这就像一个魅力，但暴露了整个文件结构，包括 node_modules 和配置，这似乎是一个坏主意。
This works like a charm, but exposes the whole file structure, including node_modules and the configuration, which seems like a bad idea.
于是，我就仅暴露应用文件夹中。要做到这一点，我做了以下内容：
So I tried to expose only the app folder. To achieve that, I did the following:
- 所引用的JavaScript文件复制在
应用程序/脚本文件夹 - 将在
index.html的在应用 - 更改该文件中引用的路径
- 在
的package.json更改精简版脚本精简版服务器--basedir应用
- Copy the referenced javascript files in an
app/scriptsfolder - Move the
index.htmlinapp - Change the references paths in this file
- Change the
litescript inpackage.jsontolite-server --baseDir app
在运行此，一切正常，除了 angular2-polyfills.js 返回：
When running this, everything worked, except that angular2-polyfills.js returned :
Error: XHR error (404 Not Found) loading http://localhost:3000/app.component(…)
run @ angular2-polyfills.js:138
zoneBoundFn @ angular2-polyfills.js:111
lib$es6$promise$$internal$$tryCatch @ angular2-polyfills.js:1511
lib$es6$promise$$internal$$invokeCallback @ angular2-polyfills.js:1523
lib$es6$promise$$internal$$publish @ angular2-polyfills.js:1494
lib$es6$promise$$internal$$publishRejection @ angular2-polyfills.js:1444
(anonymous function) @ angular2-polyfills.js:243
run @ angular2-polyfills.js:138zoneBoundFn @ angular2-polyfills.js:111
lib$es6$promise$asap$$flush @ angular2-polyfills.js:1305
当然，如果我要求的http：//本地主机：3000 / app.component.js 文件正确返回
所以我的问题是：为什么不的.js 扩展获得追加到 app.component ，导致在此错误，如该工作在服务器BASEDIR是该项目的根源在哪里？我错过了一些配置选项？
So my question is: why doesn't the .js extension get appended to app.component, resulting in this error, where that worked when the server baseDir was the root of the project ? Did I miss some configuration option ?
推荐答案
您可以配置路径，您的应用程序文件夹中。就我而言，我使用的角2来生产我们的应用程序的移动版本，不得不配置系统，像这样：
You can configure the path to your app folder. In my case, I'm using angular 2 to produce a mobile version of our app and had to configure System like so:
System.config({
paths: {
'app/*': './js/mobile/dist/*'
},
packages: {
app: {
format: 'register',
defaultExtension: 'js'
}
}
});
System.import('app/main')
.then(null, console.error.bind(console));
正如你所看到的，我决定地图应用到DIST在那里我有我的编译的JS文件，让他们从TS文件分开。
As you can see, I decided to map "app" to "dist" where I have my compiled js files to keep them separate from the ts files.
这篇关于Angular2打字稿应用抛出的组件404没有指定JS扩展时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
