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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
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.
Thanks in advance
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);
878
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 {
}
Removing the comment at the beginning of the file has solved the problem.
174
I found that this error appears in multiline comments with import/export statements. We'll fix the error if we transform the statement to some incorrect form or put the statement in a singleline comment.
Example:
/**
import { Component } from '@angular/core'; // generate error
export class TestClass { }; // generate error
// import { Component } from '@angular/core'; // correct
// export class TestClass { }; // correct
impot { Component } from '@angular/core'; // correct
export clas TestClass { }; // correct
*/
For other people who get this error and dont have comments in their code. I encountered this error and solved this by double checking my systemjs.config.js file.
While you may not have this exact problem in your systemjs.config.js file, it does demonstrate that the /traceur 404(Not Found) error may be coming from your systemjs.config.js file.
I had
var packages = {
'app_spa': { main: 'app.component.ts', defaultExtension: 'ts' },
and I changed it to
var packages = {
'app_spa': { main: 'app.component.js', defaultExtension: 'js' },
and the error went away.
6
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