使用Chart.js和Angular显示图表时出现问题

col17t5w  于 2022-11-06  发布在  Chart.js
关注(0)|答案(4)|浏览(245)

我想显示一个图表使用chart.js在Angular 。在第一次我尝试实现一个例子采取了在网上,我没有问题编译。这是代码在我的.ts:

import { Component, OnInit } from '@angular/core';
import { Chart } from "chart.js";

@Component({ 
   ...
})

export class MyChartComponent implements OnInit {
    constructor(){
    }

    ngOnInit(): void {
      new Chart("myChart", {
      type: 'bar',
      data: {
        labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
        datasets: [{
          label: '# of Votes',
          data: [12, 19, 3, 5, 2, 3],
          backgroundColor: [
            'rgba(255, 99, 132, 0.2)',
            'rgba(54, 162, 235, 0.2)',
            'rgba(255, 206, 86, 0.2)',
            'rgba(75, 192, 192, 0.2)',
            'rgba(153, 102, 255, 0.2)',
            'rgba(255, 159, 64, 0.2)'
          ],
          borderColor: [
            'rgba(255, 99, 132, 1)',
            'rgba(54, 162, 235, 1)',
            'rgba(255, 206, 86, 1)',
            'rgba(75, 192, 192, 1)',
            'rgba(153, 102, 255, 1)',
            'rgba(255, 159, 64, 1)'
          ],
          borderWidth: 1
        }]
      },
      options: {
        scales: {
          y: {
            beginAtZero: true
          }
        }
      }
    });
    }
}

在我的.html中,我有:

<div id="divChart">
  <canvas id="myChart"></canvas>
</div>

但是当我开始发球时,我有这个错误:

ERROR Error: "linear" is not a registered scale.
    _get chart.esm.js:4622
    getScale chart.esm.js:4576
    buildOrUpdateScales chart.esm.js:5224
    each helpers.segment.js:102
    buildOrUpdateScales chart.esm.js:5211
    update chart.esm.js:5336
    Chart chart.esm.js:5096
    ngOnInit my-chart.component.ts:32
    Angular 37
    zUnb main.ts:11
    Webpack 6

ERROR TypeError: area is undefined
    _isPointInArea helpers.segment.js:1266
    getNearestItems chart.esm.js:2465
    nearest chart.esm.js:2548
    getElementsAtEventForMode chart.esm.js:5503
    _handleEvent chart.esm.js:5737
    _eventHandler chart.esm.js:5720
    listener chart.esm.js:5617
    proxy chart.esm.js:3022
    throttled helpers.segment.js:28
    Angular 17
    throttled helpers.segment.js:26
    Angular 14
    addListener chart.esm.js:2905
    createProxyAndListen chart.esm.js:3028
    addEventListener chart.esm.js:3071
    _add chart.esm.js:5605
    bindEvents chart.esm.js:5619
    each helpers.segment.js:102
    bindEvents chart.esm.js:5619
    _initialize chart.esm.js:5129
    Chart chart.esm.js:5094
    ngOnInit my-chart.component.ts:32
    Angular 13

和许多其他错误。你能帮助我吗?

5q4ezhmt

5q4ezhmt1#

import { Chart, registerables} from 'chart.js';

Chart.register(...registerables);
pftdvrlh

pftdvrlh2#

Chart.js 3是tree-shakeable,因此需要导入并注册您将要使用的控制器、元素、秤和插件。
请查看Chart.js文档中的捆绑包(Webpack、Rollup等)。
在您的情况下,这可以通过以下方式完成():

import { Chart, BarElement, BarController, CategoryScale, Decimation, Filler, Legend, Title, Tooltip} from 'chart.js';

export class MyChartComponent implements OnInit {

    constructor() {
        Chart.register(BarElement, BarController, CategoryScale, Decimation, Filler, Legend, Title, Tooltip);
    }
    ...
}
xqk2d5yq

xqk2d5yq3#

我也有同样的问题,我用这种方法解决了它。使用此

import Chart from 'chart.js/auto';

而不是这样:

import { Chart } from 'node_modules/chart.js';
mm9b1k5b

mm9b1k5b4#

要注册它*延迟***,请使用构造函数**

constructor(){
       Chart.register(...registerables);
    }

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