Introduction to 'apexcharts.min.js:6 Possible Unhandled Promise Rejection: TypeError: Cannot read property 'labels'

If you are using ApexCharts in your web application and have encountered the error message "apexcharts.min.js:6 Possible Unhandled Promise Rejection: TypeError: Cannot read property 'labels'", then this article is for you.

What is ApexCharts?

ApexCharts is an open-source charting library that allows developers to create beautiful and responsive charts and plots. It is built on top of the popular JavaScript charting library, D3.js, and is designed to offer a modern and intuitive user interface.

What causes the error message?

The error message 'apexcharts.min.js:6 Possible Unhandled Promise Rejection: TypeError: Cannot read property 'labels'' occurs when the ApexCharts library is unable to read the 'labels' property of the data being passed to it. This could be due to a few reasons:

• The data being passed is not in the correct format that ApexCharts expects.
• The 'labels' property is missing from the data being passed.
• The 'labels' property is misspelled or incorrectly formatted.

How to fix the error message?

To fix the error message, check that the data being passed to ApexCharts is in the correct format and that the 'labels' property is present and correctly formatted. Here are a few tips:

• Check that the data being passed is in the correct format. ApexCharts expects the data to be in an array of objects, with each object representing a series of data points.
• Check that the 'labels' property is present and correctly formatted. Make sure that the 'labels' property is spelled correctly and that its value is an array of strings representing the labels for each data point in the series.

Here's an example of how to properly format the data for ApexCharts:

const chartData = {
  series: [
    {
      name: "Series 1",
      data: [10, 20, 30, 40, 50],
    },
    {
      name: "Series 2",
      data: [5, 15, 25, 35, 45],
    },
  ],
  labels: ["Jan", "Feb", "Mar", "Apr", "May"],
};

new ApexCharts(document.querySelector("#chart"), {
  chart: {
    type: "line",
  },
  series: chartData.series,
  xaxis: {
    categories: chartData.labels,
  },
}).render();

Notice that the data is passed in an object with both the 'labels' and 'series' properties, and that the value of the 'labels' property is an array of strings representing the labels for each data point.

Conclusion

In summary, the 'apexcharts.min.js:6 Possible Unhandled Promise Rejection: TypeError: Cannot read property 'labels'' error message is caused by an incorrect or missing 'labels' property in the data being passed to ApexCharts. To fix the error message, make sure that the data is in the correct format and that the 'labels' property is present and correctly formatted.