I’m using Dash, and I made a heatmap (go.Heatmap). It works, it’s visible, it’s gorgeous. Now I’m trying to add customdata to it (to be used on a click event later, aka I’m accessing clickdata later). I have two bar graphs were I put in customdata and when I click on them, I get the customdata fiel…

Thanks for reporting @raaid ! I have replicated the issue with this example: import dash from dash.dependencies import Input, Output import dash_html_components as html import dash_core_components as dcc import json app = dash.Dash() app.layout = html.Div([ dcc.Graph( id='heatmap', …

Thanks for responding and looking into it! =)

Any updates in looking into this, @chriddyp ?

It looks like this is possible in plotly.js: https://codepen.io/chriddyp/pen/NagXpM?editors=1011 , so this is probably a bug in the Graph component itself

Hi @chriddyp I am also experiencing this issue in Scatter traces using mode=‘lines’. The bug does indeed seem to be in the Graph component, although my JS knowledge is very limited, I am identifying the conditional below as the likely culprit: if (has('curveNumber', fullPoint) && …

[image] marcodlk: The bug seems to be that elements (such as lines) which do not have pointNumber attributes are then being cut off from having customdata. Hm, odd. I thought that mode: 'lines' would still have pointNumber. Can you make a small, reproducable example? Also, welcome to dash! …

This still appears to be a problem today (dash==1.13.4, plotly==4.8.1). customdata from go.Heatmap can appear in the figure’s hovertemplate but not in clickdata. My current solution is to include the necessary data in the figure’s text attribute and parse it out from clickdata['points'][0]['text'] …

Can you clarify what you mean by text attribute? I am also trying to navigate this issue. Thanks for the help!

I’ve also been looking at this issue with @bwander . There are two aspects of current behaviour that was unexpected but we’re not sure if they’re bugs: customdata is not returned on a clickData event with a go.Heatmap figure If text is a list, there is no complaint from plotly, however the lis…

Plotly Dash Heatmap customdata

Dash Python

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Customdata with heatmap 📊 Plotly Python	0	493	November 25, 2023
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Plotly Dash Heatmap customdata

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