loadingwyn opened a new issue #14709:
URL: https://github.com/apache/echarts/issues/14709
### Version
4.9.0
### Steps to reproduce
```js
config = {
...
toolbox: {
show: true,
feature: {
dataZoom: {
filterMode: 'none'
}
}
},
dataZoom: [
...channelList.map((c, i) => ({
type: 'inside',
// xAxisIndex: 'none',
filterMode: 'none' as any,
yAxisIndex: i
})),
{
type: 'inside',
// xAxisIndex: 'none',
filterMode: 'none',
xAxisIndex: 0
},
{
type: 'slider',
// xAxisIndex: 'none',
filterMode: 'none',
xAxisIndex: 0
}
}
}
```

### What is expected?
the max and min of y axis should match the selected area. For this case, no
data point is on the graph because no data is in the selected area.
### What is actually happening?
the max of y axis is the max value of the curve.

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