chartjs/Chart.js

[FEATURE] Add the ability to stack data for polar area chart

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#4,472 opened on Jul 6, 2017

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 (11 comments) (18 reactions) (0 assignees)JavaScript (67,416 stars) (11,951 forks)batch import
help wantedtype: enhancement

Description

Currently, polar area charts can only have one piece of data associated with a "slice". I propose that stacking of data, similar to stacked bar charts, is made possible. See image below for clarification

image

Contributor guide

Tech stack
javascripthtmlcss
Domain
frontend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
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.
mostly clear
Prerequisites
Familiarity with Chart.jsUnderstanding of polar area chartKnowledge of data stacking concept
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate how stacked bar charts are implemented in Chart.js (e.g., in src/controllers/controller.bar.js). Examine the polar area chart controller (src/controllers/controller.polarArea.js) to understand current data handling. Propose modifications to support multiple datasets with stacked values, similar to bar chart stacking. Review existing PRs or discussions for potential approaches.