我正在尝试使用 Node.js 后端让 ng2-charts 模块与我的 Angular 2 应用程序一起使用。这是我的app.module.ts
文件
import {NgModule} from "@angular/core";
import {BrowserModule} from "@angular/platform-browser";
import {FormsModule} from "@angular/forms";
import {HttpModule} from "@angular/http";
import AppComponent from "./app.component";
import TwitterService from "./twitter.service";
import BarGraphComponent from "./bar-graph.component";
import LineGraphComponent from "./line-graph.component";
import {CHART_DIRECTIVES } from "ng2-charts";
import {DataService} from "./data.service";
@NgModule({
imports: [BrowserModule, FormsModule, HttpModule ],
declarations: [AppComponent, BarGraphComponent, LineGraphComponent, CHART_DIRECTIVES],
bootstrap: [AppComponent],
providers: [TwitterService, DataService]
})
export default class AppModule { }
当我运行应用程序时,我在浏览器控制台中收到的消息如下:
所以我做了一些探索node_modules/ng2-charts/ng2-charts.js
,这就是我所看到的:
"use strict";
function __export(m) {
for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
}
var charts_1 = require('./components/charts/charts');
__export(require('./components/charts/charts'));
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = {
directives: [
charts_1.CHART_DIRECTIVES
]
};
然后我去components/charts/charts.js
,这是代码的最后一行
exports.CHART_DIRECTIVES = [BaseChartComponent];
我该如何解决这个问题?
后编辑- 我改变了app.module.ts
所以CHART_DIRECTIVES
现在是declarations
,这是我得到的新错误:
这是app.component.ts
--- 请记住,在我尝试添加chart.js
和ng2-charts.js
app.component.ts
import {Component, OnInit} from "@angular/core";
import {DataService} from "./data.service";
import TwitterService from "./twitter.service";
import {IoToken} from "./di";
import * as io from "socket.io-client";
@Component({
selector: "app",
templateUrl: "/app/app.component.html",
providers: [TwitterService, DataService, {provide: IoToken, useValue: io}]
})
export default class AppComponent implements OnInit {
topWords = this.data.topWords;
topWordsCount = this.data.topWordsCount;
topHashtags = this.data.topHashtags;
topHashtagsCount = this.data.topHashtagsCount;
tweets = this.data.tweets;
tweetsOverTime = this.data.tweetsOverTime;
getTweetCount = () => this.data.totalCount;
constructor(private twitter: TwitterService, private data: DataService) {}
ngOnInit(){
this.data.setSource(this.twitter.startStreaming());
}
}