Failed to create chart: can’t acquire context from the given item

When encountering the error message “failed to create chart: can’t acquire context from the given item”, it generally means that there is an issue with acquiring the context (or canvas) where the chart is supposed to be drawn.

This error commonly occurs when trying to create or render a chart without providing a valid canvas element or context object. The context is necessary for drawing the chart graphics on a canvas.

To resolve this error, ensure the following:

1. Make sure you have a valid canvas element in your HTML markup. The canvas element is used as a placeholder for the chart and provides the context for rendering it.
2. Obtain the context object associated with the canvas using JavaScript. You can do this by calling the getContext method on the canvas element. It accepts a string argument indicating the context type, such as “2d” for a 2D rendering context.
3. Pass the obtained context object to the chart library or framework you are using to create the chart. This allows the library to draw the chart graphics on the provided context.

Here’s an example of the HTML markup and JavaScript code for creating a simple bar chart using the Chart.js library:

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

      <script src="https://cdn.jsdelivr.net/npm/chart.js@2.9.4"></script>
      <script>
      const canvas = document.getElementById('myChart');
      const context = canvas.getContext('2d');

      const chart = new Chart(context, {{
        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
            }
          }
        }
      }});
      </script>
    
  

In this example, a canvas element with the id “myChart” is provided as the placeholder for the chart. The JavaScript code retrieves the canvas element and obtains the 2D rendering context. The context is then passed to the Chart.js library to create a bar chart using the provided data and options.

Remember to adjust the chart creation code according to the charting library or framework you are using. The key is to ensure that a valid canvas element and its context are available before creating the chart.