【发布时间】：2019-08-20 07:53:46
【问题描述】：
我一直在尝试让 Angular 元素组件正常工作，因为我正在考虑在即将进行的项目中使用它们。
我学习了许多教程（都非常相似），但无法让它们正常工作。其中一个教程是this one。
我有以下用于 Elements 项目的 package.json
{
"name": "angular-webcomponents-demo",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e",
"build:elements": "ng build --prod --output-hashing none && node build-script.js"
},
"private": true,
"dependencies": {
"@angular/animations": "~7.2.0",
"@angular/common": "~7.2.0",
"@angular/compiler": "~7.2.0",
"@angular/core": "~7.2.0",
"@angular/elements": "^7.2.15",
"@angular/forms": "~7.2.0",
"@angular/platform-browser": "~7.2.0",
"@angular/platform-browser-dynamic": "~7.2.0",
"@angular/router": "~7.2.0",
"core-js": "^2.5.4",
"rxjs": "~6.3.3",
"tslib": "^1.9.0",
"zone.js": "~0.8.26",
"document-register-element": "^1.7.2"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.13.0",
"@angular/cli": "~7.3.8",
"@angular/compiler-cli": "~7.2.0",
"@angular/language-service": "~7.2.0",
"@types/jasmine": "~2.8.8",
"@types/jasminewd2": "~2.0.3",
"@types/node": "~8.9.4",
"codelyzer": "~4.5.0",
"concat": "^1.0.3",
"fs-extra": "^8.1.0",
"jasmine-core": "~2.99.1",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~4.0.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "~2.0.1",
"karma-jasmine": "~1.1.2",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.4.0",
"ts-node": "~7.0.0",
"tslint": "~5.11.0",
"typescript": "~3.2.2"
}
}
我按照指示使用 npm un build:elements 构建，然后尝试使用我能做到的最简单的 html 进行托管
即
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="analytics-counter.js"></script>
</head>
<body>
<analytics-counter></analytics-counter>
</body>
</html>
最初我收到类似于this post 的错误（除了我提到的custom-root 而不是“app-root”。
我已经从引导程序中删除了该组件，所以现在我的 app.module.ts 中有以下内容
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { Injector } from '@angular/core';
import { createCustomElement } from '@angular/elements';
import { AppComponent } from './app.component';
import { AnalyticsCounterComponent } from './analytics-counter/analytics-counter.component';
@NgModule({
declarations: [
AppComponent,
AnalyticsCounterComponent
],
imports: [
BrowserModule
],
entryComponents: [
AnalyticsCounterComponent
],
providers: []
})
export class AppModule {
constructor(private injector: Injector) {
}
ngDoBootstrap() {
const el = createCustomElement(AnalyticsCounterComponent, { injector: this.injector });
customElements.define('analytics-counter', el);
}
}
我从 index.html 中删除了<custom-root>，并看到了建议的 elswhere
我现在得到的错误是
Uncaught TypeError: Failed to construct 'HTMLElement': Please use the 'new' operator, this DOM object constructor cannot be called as a function.
at t [as constructor] (analytics-counter.js:4)
at new t (analytics-counter.js:4)
at CustomElementRegistry.e.<computed> [as define] (analytics-counter.js:2)
at new e (analytics-counter.js:4)
at analytics-counter.js:4
at Mo (analytics-counter.js:4)
at analytics-counter.js:4
at new e (analytics-counter.js:4)
at Object.ti [as createNgModuleRef] (analytics-counter.js:4)
at t.create (analytics-counter.js:4)
教程和解释看起来都非常简单，但我无法让最基本的示例正常工作。
这里有什么问题？
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