dirslashls opened a new issue #15022:
URL: https://github.com/apache/echarts/issues/15022
### Version
5.1.1
### Steps to reproduce
Use the following bar chart config
```js
option = {
xAxis: {
type: 'category',
},
yAxis: {
type: 'value'
},
visualMap: {
type: 'piecewise',
categories: ['M','W'],
dimension: 2,
},
series: [{
data: [
{ value: ['Mon',100,'M'], z: 10 },
{ value: ['Mon',20,'W'], z: 20 }
],
type: 'bar',
}]
};
```
### What is expected?
Hovering over the larger bar shouldn't hide the overlapping smaller bar
below as it has higher z value (I also tried with zlevel).
### What is actually happening?
It hides the element with higher z/zlevel.
---
The zindex of html works this way where higher zindex elements always remain
on top as you hover over the lower zindex elements.
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