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<div class="relative i-full" style="block-size: 400px;">
  <canvas aria-label="Example" role="img" data-controller="chart" data-chart-type-value="bubble" data-chart-data-value="{"labels":["January","February","March","April"],"datasets":[{"label":"Dataset 1","backgroundColor":"#93c5fd","data":[{"x":20,"y":32,"r":15},{"x":30,"y":30,"r":25},{"x":35,"y":20,"r":13},{"x":40,"y":10,"r":10}]}]}"></canvas>
</div>
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<% @chart_data = {
  labels: [ "January", "February", "March", "April" ],
  datasets: [{
    label: "Dataset 1",
    backgroundColor: "#93c5fd",
    data: [{ x: 20, y: 32, r: 15 }, { x: 30, y: 30, r: 25 }, { x: 35, y: 20, r: 13 }, { x: 40, y: 10, r: 10 }]
  }]
} %>
<div class="relative i-full" style="block-size: 400px;">
  <%= tag.canvas aria: { label: "Example" }, role: "img", data: { controller: "chart", chart_type_value: "bubble", chart_data_value: @chart_data.to_json } %>
</div>
CSS is not required or multiple files are needed, check the notes.
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import { Controller } from "@hotwired/stimulus"
import { Chart, registerables } from "https://esm.sh/chart.js@4.5.0?standalone"
export default class extends Controller {
  static values = { type: { type: String, default: "line" }, data: Object, options: Object }
  initialize() {
    Chart.register(...registerables)
    Chart.defaults.backgroundColor = getComputedStyle(document.body).backgroundColor
    Chart.defaults.borderColor = getComputedStyle(document.body).borderColor
    Chart.defaults.color = getComputedStyle(document.body).color
    Chart.defaults.font.family = getComputedStyle(document.body).fontFamily
    Chart.defaults.font.size = 12
  }
  connect() {
    this.chart = new Chart(this.element, this.#settings)
  }
  disconnect() {
    this.chart.destroy()
  }
  get #settings() {
    return { type: this.typeValue, data: this.dataValue, options: this.optionsValue }
  }
}

Dependencies