Datazoom: Cannot set property xxx of undefined

[https://echarts.apache.org/examples/en/editor.html?c=line-aqi](https://echarts.apache.org/examples/en/editor.html?c=line-aqi)

When I drag the data zoom feature, an error is displayed in the console. I believe there is room for improvement in this aspect. As I monitor all errors on my website, this particular error occurs most frequently.

Please check it. Thank you.

In Chrome