我想使用StimulusJS在 Ruby on Rails中运行Chart.js的第一个示例。但由于某种原因,它只是渲染了一个空画布(参见 [ 3 ])。
这是html:
<div data-controller="linechart">
<canvas data-linechart-target="myChart" width="400" height="400"></canvas>
</div>
这是我的刺激控制器:
import {Controller} from "@hotwired/stimulus"
import Chart from 'https://cdn.skypack.dev/chartjs';
export default class extends Controller {
static targets = ['myChart'];
canvasContext() {
return this.myChartTarget.getContext('2d');
}
connect() {
new Chart(this.canvasContext(), {
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
}
}
}
});
}
}
我错过了什么?