ChartJS Line Chart

Multiple Line Chart

by Leelenaleee

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.0.0-rc.4/chart.js"></script>
<body>
    <canvas id="chartJSContainer" width="600" height="400"></canvas>
</body>

CSS

canvas { background-color : #eee;
}

JavaScript

var options = {
  type: 'pie',
  data: {
    labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
    datasets: [{
        label: '# of Votes',
        data: [12, 19, 3, 5, 2, 3],
        borderWidth: 1,
        backgroundColor: ["#CB4335", "#1F618D", "#F1C40F", "#27AE60", "#884EA0", "#D35400"],
      }
    ]
  },
  options: {
    plugins: {
    	legend: {
      	onHover: (evt, item) => {
          chart.data.datasets[0].backgroundColor = chart.data.datasets[0].backgroundColor.map((el, i) => ((i === item.index) || (el.length === 9) ? el : el + '4D'))
          chart.update()
        },
        onLeave: () => {
        	chart.data.datasets[0].backgroundColor = chart.data.datasets[0].backgroundColor.map((el) => (el.length === 9 ? el.slice(0, -2) : el))
          /* chart.data.datasets[0].backgroundColor = ["#CB4335", "#1F618D", "#F1C40F", "#27AE60", "#884EA0", "#D35400"] */
          chart.update()
        }
      }
    }
  }
}

var ctx = document.getElementById('chartJSContainer').getContext('2d');
const chart = new Chart(ctx, options);