chartjs/Chart.js

[FEATURE] Datasets as a map/object instead of (just) arrays

Open

#5,011 opened on Nov 30, 2017

View on GitHub
 (5 comments) (1 reaction) (0 assignees)JavaScript (67,416 stars) (11,951 forks)batch import
help wantedtype: enhancement

Description

I have data I'm adding dynamically to a chart where some data sources have more things to plot than others

So ideally I would do

  mchart.data.datasets[key].data[i]

where key is not a number - that way I don't have to worry about preprocessing the data an ensuring I have a mapping from key -> chart.js index myself

I realize the tradeoff is then there is no set order (maybe alphabetical order?) in the display of the legend

If there is a reason I don't see why this would not work, my apologies and we can close this.

Contributor guide

Tech stack
javascript
Domain
frontend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
None
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate how Chart.js currently handles datasets as arrays in the data structure (likely in src/core/core.datasetController.js or similar). The issue proposes allowing objects as an alternative, with alphabetical legend ordering. Review the legend generation code to understand ordering implications. Check issue comments for any maintainer feedback or related discussions.
[FEATURE] Datasets as a map/object instead of (just) arrays · chartjs/Chart.js#5011 | Good First Issue