plotly / plotly/plotly.js

Rangeslider range expands beyond data range and can’t be reset

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bug P3
Dominant language
JavaScript
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Description

I am copying this issue from a post on the plotly forum (https://community.plot.ly/t/rangeslider-range-expands-beyond-data-range-and-cant-be-reset/32193). Apparently this is a bug, and I am hopeful that posting it here helps others.

Basically: The rangeslider range can be expanded beyond the range of the actual data. Once this happens, it’s not possible to reset the range slider range.

Any help on this issue would be appreciated! Is it a known issue? Is my config wrong?

Here is as gif (which is a copy of the one on the forum post):

Here is a reproducible code sandbox: https://codesandbox.io/s/cool-hill-zdlh7
Uses: plotly-js, and react

I’ve tried a variety of things to fix this, but have not found a solution.

Is there a way to set the range programatically?

for instance: if range > limit, range = limit
Is there a config/layout option to limit the range?

I have found working examples that DON’T exhibit this behavior here:
https://plot.ly/python/range-slider/


Possibly I can look into fixing this myself but I am not familiar with the codebase. In addition, I see lots of room for improvement in the rangeslider behavior, adopting ideas from the C3 sub-graph, and the like.

Some possible changes to the behavior:
We could make it so the range slider can't move beyond the graph's actual data range. Although, would this cause issues for a graph that allows zooming out far away from the data?

We could simply allow the range slider to collapse back a preferred size which matches the entire data set. This must happen on graph initialization anyway. It could be tied to double-click.


Also, a little off topic, but it may not even make sense to have the range slider directly attached to the original graph... what if it was simply a separate graph component, fed the same (or additional) data as the main graph, except with a selectable area. This might also address some of the customizability limitations of the rangeslider. In fact, the zoom-rectangle and left-right zoom handle functionality is already there, the graph just hast to NOT zoom in after the selection is made and report it back to a callback, which can be fed to another graph. Similar to the selectable area of the react-vis 2d-draggable-area

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by running the linked CodeSandbox reproduction and comparing the rangeslider behavior with the referenced working examples. Trace the plotly.js rangeslider entry point to determine how its range is expanded and reset. Done requires an agreed expected behavior, a reproducible fix, and verification that the range can be restored without breaking valid zooming.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript, react
Domain
data-visualization, frontend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
28/100

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