我是新的 in Typescript/Angular2语言。我试图从TypeScript书籍开发示例应用程序,但我总是得到以下错误:Typescript(或angular2)错误:RuntimeMetadataResolver没有提供者
No provider for RuntimeMetadataResolver (ComponentResolver -> RuntimeCompiler -> RuntimeMetadataResolver)
在浏览器控制台中。 我认为问题出在packages.json的组件版本中。 Angular2已经使用npm install安装,因此版本为2.0beta17。
堆栈跟踪:
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:25797:23 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:26406:9 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:26442:9 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27967:19 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27995:20 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27958:20 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27948:16 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27845:31 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27817:20 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27806:16 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27461:36 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27986:23 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27958:20 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27948:16 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27845:31 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27817:20 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27806:16 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27461:36 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27986:23 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:27958:20 [angular]
[email protected]:///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<[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32701:32 [angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:117:24 [<root> => angular]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32732:60 [<root>]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:32968:51 [<root>]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36772:9 [<root>]
[email protected]:///C:/ProgettiWeb/TestAngular/Chapter2/static/scripts/index.js:36581:12 [<root>]
[email protected]:///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>
的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']);
静态/ index.html中
<!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>
然后我跑 “吞掉”,我在加载中的index.html浏览器和我得到这个错误。
我有动态创建一个文件夹node_modules其中包含一个angular2文件夹...
在此先感谢。
编辑:我检查了我的index.js生成的文件和
var RuntimeMetadataResolver = (function() {
存在。 此外,
exports.COMPILER_PROVIDERS
包含
__small$_xxx.RuntimeMetadataResolver
EDIT2:没有错误npm ls
命令
不幸的是,您的图书使用的是Angular 2的过时版本;自测试版17以来出现了许多重大变化。考虑使用[官方文档](https://angular.io/docs/ts/latest/)学习Angular 2。 –
但是我正在学习打字稿...... Angular版本是2.0 beta 17,书中的示例使用了相同的版本。我已经使用'npm install'安装了它。我如何编辑我的文件? – Emanuele
您遇到的错误是Angular 2特有的。为了您学习TypeScript的目的,我建议您从书中找到一个不同的示例,而不是过时的Angular 2示例。 – yuxhuang