hughess opened a new issue, #21280:
URL: https://github.com/apache/echarts/issues/21280
### What problem does this feature solve?
I need to have a specific series tooltip appear when user hovers over an
area in an area chart. Currently it seems you can only use the
triggerLineEvent, which requires you to hover over the specific point in the
line.
To workaround this requires rebuilding some of the detection logic based on
mouse position, which will be fragile and complex.
This seems like a basic expected feature for an end user of a chart.
I need the same for bars, but it is easier to build the custom logic for
bars so I am not blocked on that, though having the ability to combine both
trigger axis and item in a multi-series bar chart would be great (hover over
axis show all series; hover over segment show just that segment's values).
I am already going to have to build custom logic for line charts to detect
the closest line to the cursor, but I can't use that for areas because closest
line would give you the wrong output for an area
### What does the proposed API look like?
I am not sure what the API should look like, but I would consider this
behaviour to be the desired default behaviour for stacked charts, so maybe it
is a new "trigger" option in addition to "axis" and "item" ("hybrid"?)
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