[Feature Request] Allow ordering items by value for unified x hovermode

At the moment, it seems that order of items is hardcoded in the following line:

Line 1043 in 4ce0c8b

    
           legendOpts.entries.sort(function(a, b) { return a[0].trace.index - b[0].trace.index;});

It would be great to allow ordering items by value for unified x hovermode as mentioned in comments #4477 (comment) and #4477 (comment).

Current behavior sample:

Desired behavior sample:

Might mitigate #4786 in some cases (like the one showed above).

@nicolaskruchten

Hi @nicolaskruchten @chriddyp @ndrezn - Any plans to take a look here soon? Right now we're stuck between a choice of (a) covering up the x-axis value on hover but having data nicely sorted and (b) displaying x-axis value but losing data sort.

It's not a bad idea, we could add a flag that would control this behaviour but no one on our team is looking at this at the moment, no. We'd accept a pull request for someone who wanted to implement it though!

@mayeut

Chiming in to agree with @mayeut; Ordering tooltip by trace value rather than legend order would be super cool

I am also looking for this feature and stumble on this thread. Has this been implemented yet? Thanks.

For me, with plotly js, in the plot config, with hovermode = "x", it works.

@gvwilson

Hi - we are tidying up stale issues and PRs in Plotly's public repositories so that we can focus on things that are still important to our community. Since this one has been sitting for a while, I'm going to close it; if it is still a concern, please add a comment letting us know what recent version of our software you've checked it with so that I can reopen it and add it to our backlog. If you'd like to submit a PR, we'd be happy to prioritize a review, and if it's a request for tech support, please post in our community forum. Thank you - @gvwilson

plotly==5.24.1 the functionality is still not there
Can you please re-open this issue?

@KacemKhaled

@KacemKhaled reopened, but we have no plans to implement this - we'd be happy to prioritize review of a PR from the community. thanks - @gvwilson

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[Feature Request] Allow ordering items by value for unified x hovermode #5362

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[Feature Request] Allow ordering items by value for unified x hovermode #5362

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mayeut commented on Dec 26, 2020

miranda-luna-db commented on Nov 4, 2021

nicolaskruchten commented on Nov 4, 2021

nlyle01 commented on Jan 9, 2023

vicn1222 commented on Dec 9, 2023

JeromeC-B commented on Jan 8, 2024

gvwilson commented on Jul 12, 2024

KacemKhaled commented on Apr 9, 2025

gvwilson commented on Apr 9, 2025

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