[FEATURE]: Support hovering all overlapping points

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Evaluación

Dificultad
5/5
Tiempo estimado
Más de una semana
Aptitud para principiantes
12/100
Tipo de issue
Nueva funcionalidad
Claridad
Necesita aclaración
Estado de actividad
Activo
Stack tecnológico
javascript
Área
data-visualization, frontend

Línea de trabajo

The issue names no source files, tests or entry points, so start by reading the earlier threads it links (plotly.js #720, #4294, #7578, #7663) to see what was already decided about hover. It is a proposal with no agreed UI, so the first step is a design discussion with maintainers. Done means an agreed interaction and a scoped implementation plan.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

enhancement feature P3 size: 5
Description

This is more like a proposal aimed at integrating and refining a long-standing feature request regarding hover behavior at overlapping points.

When multiple points overlap at the same position, Plotly currently selects a single winning point for hover. This means the hover information of the other overlapping points is inaccessible.

It would be useful to support hovering all overlapping points, either by displaying multiple hover labels or by grouping them into a single tooltip.

For cases with many overlapping points, a compact grouped tooltip that can be pinned and expanded could also be useful. For example, TanStack Charts demonstrates a pattern where the tooltip stays compact on hover and expands to show richer content when pinned. Similar hover pinning behavior has also been requested in Plotly.js (#7578, #7663):

https://tanstack.com/charts/catalog/charts/84-pinned-nested-chart-tooltip

Image Image

The exact UI does not necessarily need to follow this pattern. A similar interaction may already be possible by pre-grouping overlapping data (as long as the other overlapped records can be retrieved from the current hover winner), but native support could make it easier to implement.

Related discussions

This has come up several times over the years:

Plotly Community

Previous issues

Lenguaje dominante
JavaScript
Estrellas
18.4k
Forks
2.1k
Merge medio
1 d 5 h
PR fusionados (30 d)
12

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