Typescript（或angular2）错误：没有RuntimeMetadataResolver的提供程序

Question

I'm new in Typescript/Angular2 languages. I'm trying to develop sample application from a Typescript book but I always get the following error:

No provider for RuntimeMetadataResolver (ComponentResolver -> RuntimeCompiler -> RuntimeMetadataResolver)

in the browser console. I think the problem is in component version in packages.json. Angular2 has been installed using npm install so the version is 2.0beta17.

Stacktrace:

BaseException@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:25797:23 [angular]
AbstractProviderError@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:26406:9 [angular]
NoProviderError@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:26442:9 [angular]
ReflectiveInjector_.prototype._throwOrNull@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27967:19 [angular]
ReflectiveInjector_.prototype._getByKeyDefault@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27995:20 [angular]
ReflectiveInjector_.prototype._getByKey@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27958:20 [angular]
ReflectiveInjector_.prototype._getByReflectiveDependency@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27948:16 [angular]
ReflectiveInjector_.prototype._instantiate@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27845:31 [angular]
ReflectiveInjector_.prototype._instantiateProvider@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27817:20 [angular]
ReflectiveInjector_.prototype._new@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27806:16 [angular]
ReflectiveInjectorDynamicStrategy.prototype.getObjByKeyId@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27461:36 [angular]
ReflectiveInjector_.prototype._getByKeyDefault@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27986:23 [angular]
ReflectiveInjector_.prototype._getByKey@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27958:20 [angular]
ReflectiveInjector_.prototype._getByReflectiveDependency@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27948:16 [angular]
ReflectiveInjector_.prototype._instantiate@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27845:31 [angular]
ReflectiveInjector_.prototype._instantiateProvider@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27817:20 [angular]
ReflectiveInjector_.prototype._new@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27806:16 [angular]
ReflectiveInjectorDynamicStrategy.prototype.getObjByKeyId@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27461:36 [angular]
ReflectiveInjector_.prototype._getByKeyDefault@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27986:23 [angular]
ReflectiveInjector_.prototype._getByKey@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27958:20 [angular]
ReflectiveInjector_.prototype.get@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27767:16 [angular]
coreLoadAndBootstrap/<@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36582:33 [angular]
ApplicationRef_.prototype.run/<@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36774:26 [angular]
NgZoneImpl/this.inner<.onInvoke@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32701:32 [angular]
Zone.prototype.run@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:117:24 [<root> => angular]
NgZoneImpl.prototype.runInner@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32732:60 [<root>]
NgZone.prototype.run@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32968:51 [<root>]
ApplicationRef_.prototype.run@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36772:9 [<root>]
coreLoadAndBootstrap@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36581:12 [<root>]
bootstrap@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:68267:12 [<root>]
@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:68328:1 [<root>]
@file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:1:2 [<root>]
  index.js:45341:13
    BrowserDomAdapter.prototype.logError file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:45341:13
    ExceptionHandler.prototype.call file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:25704:13
    ApplicationRef_.prototype.run/< file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36783:17
    ZoneDelegate.prototype.invoke file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:233:17
    NgZoneImpl/this.inner<.onInvoke file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32701:32
    ZoneDelegate.prototype.invoke file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:232:17
    Zone.prototype.run file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:117:24
    NgZoneImpl.prototype.runInner file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32732:60
    NgZone.prototype.run file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32968:51
    ApplicationRef_.prototype.run file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36772:9
    coreLoadAndBootstrap file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36581:12
    bootstrap file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:68267:12
    <anonimo> file:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:68328:1
    <anonimo>

Package.json:

{
  "name": "weather-widget",
  "version": "1.0.0",
  "private": true,
  "description": "",
  "dependencies": {
    "angular2": "^2.0.0-beta.17",
    "es6-shim": "^0.35.1",
    "reflect-metadata": "^0.1.2",
    "rxjs": "^5.0.0-beta.6",
    "zone.js": "^0.6.12"
  },
  "devDependencies": {
    "gulp": "^3.9.1",
    "gulp-sourcemaps": "^1.9.1",
    "gulp-typescript": "^3.1.3",
    "gulp-uglify": "^2.0.0",
    "small": "^0.2.7"
  }
}

lib/index.ts:

import "zone.js";
import "rxjs";
import "reflect-metadata";
import "es6-shim";

import { bootstrap } from "angular2/platform/browser";
import {About} from "./about";

bootstrap(About).catch(err => console.error(err));

lib/about.ts

import { Component } from "angular2/core";

@Component({
    selector: "about-page",
    template: `
        <h2>About</h2>
        This widget shows the weather forecast of Utrecht.
        The next 24 hours are shown under 'Today' and the forecast of 24-48 hours ahead under 'Tomorrow'.
        `
})
export class About {

}

lib/tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "module": "commonjs",
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "lib": ["es2015", "dom"]
    }
}

gulpfile.js

var gulp = require('gulp');
var typescript = require('gulp-typescript');
var small = require('small').gulp;
var sourcemaps = require('gulp-sourcemaps');
var uglify = require('gulp-uglify');

var tsProject = typescript.createProject('lib/tsconfig.json', {
    typescript: require('typescript')
});

gulp.task('compile', function() {
    return gulp.src('lib/**/*.ts')
        .pipe(sourcemaps.init())
        .pipe(tsProject())
        .pipe(small('index.js', {
            externalResolve: ['node_modules'],
            globalModules: {
                "crypto": {
                    standalone: "undefined"
                }
            }
        }))
        .pipe(sourcemaps.write('.'))
        .pipe(gulp.dest('static/scripts'));
});
gulp.task('release', ['compile'], function() {
    return gulp.src('static/scripts/scripts.js')
        .pipe(uglify())
        .pipe(gulp.dest('static/scripts'));
});

gulp.task('default', ['compile']);

static/index.html

<!DOCTYPE HTML>
<html>
    <head>
        <title>Weather</title>
        <link rel="stylesheet" href="style.css" />
    </head>
    <body>
        <div id="wrapper">
            <about-page>Loading..</about-page>
        </div>
        <script src="scripts/index.js" type="text/javascript"></script>
    </body>
</html>

Then I run "gulp", I load the index.html in the browser and I get that error.

I have a node_modules folder created dynamically which contains an angular2 folder...

Thanks in advance.

EDIT: I checked my index.js generated file and

var RuntimeMetadataResolver = (function () {

is present. Moreover,

exports.COMPILER_PROVIDERS

contains

__small$_xxx.RuntimeMetadataResolver

EDIT2: No error in npm ls command

Answer 1

This appears to be not an issue with Angular, nor TypeScript, but the module bundler Small had a bug. A file a/b could be compiled twice (under conditions), namely as a/b and a\\b . This only happened on Windows. This broke some functionality of Angular. Can you try to update to small@0.2.8 ?

Answer 2

Try to upgrade from beta to latest version of angular and try.

Try using "npm update"

Answer 3

you should import it in the root module class according to the documentation . In your case it should be:

@NgModule({
  imports:      [ BrowserModule, RuntimeMetadataResolver],
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }