Can't get the chart.js annotation feature to work

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Patrick Carra

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Apr 6, 2020, 4:44:52 PM4/6/20
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Hello I am new to chart.js but I was trying to draw a horizontal line on my line chart and I read that annotation was the way to go.  I am using a cdn right now for chart.js and I have included my code below anyone have any ideas what I am doing wrong?

<script src="https://cdn.jsdelivr.net/npm/char...@2.9.3/dist/Chart.min.js"></script>
<!--<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-annotation/0.5.7/chartjs-plugin-annotation.js"></script>-->
<canvas id="myChart" width="400" height="150"></canvas>
<script>
<!--import * as ChartAnnotation from 'chartjs-plugin-annotation';-->
var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
    type: 'line',
    data: {
        labels: {{ labels|safe }},
        datasets: [{
            label: 'Utilization %',
            data: {{ data|safe }},
            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: {
            yAxes: [{
                ticks: {
                    beginAtZero: true,
                    suggestedMax: 200,
                }
            }]
        }
    },
    plugins: {
        annotation: {
            annotations: [{
                type: 'line',
                mode: 'horizontal',
                scaleID: 'y-axis-0',
                value: 95,
                borderColor: 'red',
                borderWidth: 4,
                label: {
                    content: 'Test label',
                }
            }]
        }
    }
});

I also tried to include a cdn for chart.js plugin annotation?  I'm not sure if this is necessary and it didn't work so I commented it out.  Any suggestions are welcome like I said I'm new and can't figure out how to make this work.


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