在 Angular 中使用Chart.js 和 ng2-charts的示例代码

# Yarn:
$ yarn add ng2-charts chart.js

# or npm 
$ npm install ng2-charts charts.js --save

//: .angular-cli.json (partial)
"script": [
 "../node_modules/chart.js/dist/Chart.min.js"
]

//: app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { ChartsModule } from '@angular/charts';

import { AppComponent } from './app.component';

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

//: app.component.html

<div style="width: 40%;">
 <canvas
   baseChart
   [chartType]="'line'"
   [datasets]="chartData"
   [labels]="chartLabels"
   [options]="chartOptions"
   [legend]="true"
   (chartClick)="onChartClick($event)">
 </canvas>
</div>

//: app.component.ts

import { Component } from '@angular/core';

@Component({ ... })
export class AppComponent {
 chartOptions = {
  responsive: true
 };

 chartData = [
  { data: [330, 600, 260, 700], label: 'Account A' },
  { data: [120, 455, 100, 340], label: 'Account B' },
  { data: [45, 67, 800, 500], label: 'Account C' }
 ];

 chartLabels = ['January', 'February', 'Mars', 'April'];

 onChartClick(event) {
  console.log(event);
 }
}

myColors = [
 {
  backgroundColor: 'rgba(103, 58, 183, .1)',
  borderColor: 'rgb(103, 58, 183)',
  pointBackgroundColor: 'rgb(103, 58, 183)',
  pointBorderColor: '#fff',
  pointHoverBackgroundColor: '#fff',
  pointHoverBorderColor: 'rgba(103, 58, 183, .8)'
 },
 // ...colors for additional data sets
];

//: app.component.ts(partial)

newDataPoint(dataArr = [100, 100, 100], label) {

 this.chartData.forEach((dataset, index) => {
  this.chartData[index] = Object.assign({}, this.chartData[index], {
   data: [...this.chartData[index].data, dataArr[index]]
  });
 });

 this.chartLabels = [...this.chartLabels, label];

}

//: app.component.html(partial)

<button (click)="newDataPoint([900, 50, 300], 'May')">
 Add data point
</button>