Position tooltip relative to highlighted data item

[Bilge]

What problem does this feature solve?

Using tooltip position callback, one can position the tooltip relative to the mouse or bounding container, but it does not expose any information about the highlighted data item or its position.

What does the proposed API look like?

series-line.tooltip.position = function (point: Array, params: Object|Array.<Object>, dom: HTMLDomElement, rect: Object, size: Object, itemRect: Object)

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[susiwen8]

I wasn't quiet follow, could you be more specific? Actually, tooltip's position wasn't easy......

[Bilge]

@susiwen8 Sure. I want to position the tooltip relative to (near to) a highlighted data item (shown with red arrow) instead of relative to the mouse (shown with red circle).

[susiwen8]

Ok, I see, 5.0 will solve this
#12947

[Bilge]

@susiwen8 How did 5.0 solve this? The documentation for tooltip.position is word-for-word the same as v4.

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