myChartOne.setOption is not a function

This error typically occurs when you are trying to call the "setOption" method on a variable that is not an object or does not have the "setOption" method defined. Here are some possible causes and solutions:

1. Make sure you have included the necessary JavaScript libraries for your charting library. For example, if you are using ECharts, you need to include the echarts.min.js file in your HTML document.

2. Check that you have properly defined the variable that holds your chart object. Make sure that the variable name matches the name used in your charting library's documentation.

3. Verify that you have initialized your chart object before calling the "setOption" method. Some charting libraries require you to call a specific function to initialize the chart, such as "echarts.init()" for ECharts.

4. Make sure that you are calling the "setOption" method on the correct object. If you have multiple charts on the same page, you may need to specify the ID or class of the chart you want to modify.

5. Check that you are using the correct syntax for the "setOption" method. Some charting libraries may require additional parameters or options to be passed to this method.

Overall, this error indicates that there is a problem with your charting code, specifically with how you are trying to modify the chart options. By troubleshooting these common causes, you should be able to resolve the issue and get your chart to display correctly.