How to customize the legend labels in Chart.js to display as dashed lines?

To customize the legend labels in Chart.js to display as dashed lines that match the style of the lines in the chart, you can use the following code snippet:

```javascript
var config = {
  type: 'line',
  data: {
    labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
    datasets: [{
      label: 'Dataset 1',
      data: [65, 59, 80, 81, 56, 55, 40],
      borderColor: 'red',
      borderDash: [5, 5] // Set borderDash to define a dashed line
    }, {
      label: 'Dataset 2',
      data: [28, 48, 40, 19, 86, 27, 90],
      borderColor: 'blue',
      borderDash: [5, 5] // Set borderDash to define a dashed line
    }]
  },
  options: {
    legend: {
      labels: {
        // Use the same line style as in the datasets
        filter: function(legendItem, chartData) {
          if (legendItem.datasetIndex && chartData.datasets[legendItem.datasetIndex].borderDash) {
            legendItem.lineStyle = chartData.datasets[legendItem.datasetIndex].borderDash;
          }
          return true;
        }
      }
    }
  }
};
```

In this code snippet, we defined two datasets with dashed lines using the `borderDash` property. Then, we customized the legend labels to display the same line style as in the datasets by using the filter function in the legend options. The `filter` function checks if the dataset has a `borderDash` defined and sets the `lineStyle` of the legend item accordingly.

By using this code snippet, the legend labels in Chart.js will display as dashed lines that match the style of the lines in the chart.

вот ответ 
 
 
labels: {
                    usePointStyle: true,
                    color: '#283d4a',
                    generateLabels: function (chart) {
                        let data = chart.data;
                        if (data.labels.length && data.datasets.length) {
                            let labels = [];
                            data.datasets.forEach(function (dataset, i) {
                                if (dataset.label) {
                                    const lineDash =
                                        dataset.borderDash && dataset.borderDash.length > 0 ? dataset.borderDash : [];
                                    labels.push({
                                        text: dataset.label,
                                        color: dataset.borderColor,
                                        strokeStyle: dataset.borderColor,
                                        fillStyle: dataset.borderColor,
                                        lineDash: lineDash.length ? [3, 3] : [],
                                        hidden: !chart.isDatasetVisible(i),
                                        index: i,
                                        usePointStyle: true,
                                        pointStyle: 'line',
                                        pointStyleWidth: 40,
                                    });
                                }
                            });
                            return labels;
                        }
                        return null;
                    },
                },