Angular2:启动应用程序"http://localhost:3000/traceur 404(未找到)"时出现错误； [英] Angular2: error at startup of the app "http://localhost:3000/traceur 404 (Not Found)"
问题描述
我有一个全新的Angular(rc1)安装. 我想我刚刚创建了通常的"Hello something"应用程序，但是，当我从浏览器启动该应用程序时，在浏览器控制台上出现以下错误
I have a brand new installation of Angular (rc1). I think I have just created the usual 'Hello something' app but, when I launch the app from browser, I get the following error on the browser console
有人可以向我解释我做错了什么吗?我肯定有问题，因为其他更复杂的功能可以在我的计算机上完美地与rc1配合使用.
Can anybody explain me what I have done wrong? I must have something wrong since other much more complex things work perfectly with rc1 on my machine.
预先感谢
app.component.ts
import { Component } from '@angular/core';
@Component({
selector: 'm2t-app',
template: `
Hello something
`,
directives: []
})
export class AppComponent {
}
main.ts
import { bootstrap } from '@angular/platform-browser-dynamic';
import { AppComponent } from './app.component';
bootstrap(AppComponent);
index.html
<html>
<head>
<title>MEAN2 Training Class</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="styles.css">
<!-- 1. Load libraries -->
<!-- Polyfill(s) for older browsers -->
<script src="node_modules/es6-shim/es6-shim.min.js"></script>
<script src="node_modules/zone.js/dist/zone.js"></script>
<script src="node_modules/reflect-metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<!-- 2. Configure SystemJS -->
<script src="systemjs.config.js"></script>
<script>
System.import('app').catch(function(err){ console.error(err); });
</script>
</head>
<!-- 3. Display the application -->
<body>
<m2t-app>Loading...</m2t-app>
</body>
</html>
systemjs.confing.js
(function(global) {
// map tells the System loader where to look for things
var map = {
'app': 'app', // 'dist',
'rxjs': 'node_modules/rxjs',
'angular2-in-memory-web-api': 'node_modules/angular2-in-memory-web-api',
'@angular': 'node_modules/@angular'
};
// 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' },
'angular2-in-memory-web-api': { defaultExtension: 'js' },
};
var packageNames = [
'@angular/common',
'@angular/compiler',
'@angular/core',
'@angular/http',
'@angular/platform-browser',
'@angular/platform-browser-dynamic',
'@angular/router',
'@angular/router-deprecated',
'@angular/testing',
'@angular/upgrade',
];
// add package entries for angular packages in the form '@angular/common': { main: 'index.js', defaultExtension: 'js' }
packageNames.forEach(function(pkgName) {
packages[pkgName] = { main: 'index.js', defaultExtension: 'js' };
});
var config = {
map: map,
packages: packages
}
// filterSystemConfig - index.html's chance to modify config before we register it.
if (global.filterSystemConfig) { global.filterSystemConfig(config); }
System.config(config);
})(this);
推荐答案
我找到了原因.在app.component.ts的开头，我评论了一个愚蠢的AppComponent的早期版本，例如
I found the reason. At the beginning of app.component.ts I had commented an earlier version of the silly AppComponent, something like
/*
import { AnotherComponent } from './anotherComponent.component'
// some other code
}*/
import { Component } from '@angular/core';
@Component({
selector: 'm2t-app',
template: `
Hello something
`,
directives: []
})
export class AppComponent {
}
删除文件开头的注释已解决了问题.
Removing the comment at the beginning of the file has solved the problem.
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