portaljs-add-chart
Add a chart (line, bar, area, pie, or scatter) to a dataset's showcase in a PortalJS portal. Installs recharts, writes a reusable Chart component, and renders it in the showcase Views section. Use when visualizing a dataset already registered in datasets.json.
npx skills add datopian/portaljs --skill portaljs-add-chart --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# PortalJS — Add Chart ## Overview Add a visualization to a dataset's **showcase** in a PortalJS portal. The skill installs `recharts` (added directly — never `@portaljs/components`), writes a reusable client-side `Chart` component into `components/`, and renders a `<Chart />` into the **Views** section of the showcase route `pages/[owner]/[slug].tsx` for one chosen dataset. The chart reads the same `/public/data/<file>` the showcase `<Table />` already uses, so no data is duplicated. Five chart types are supported: line, bar, area, pie, and scatter. ## Prerequisites - A scaffolded PortalJS portal (see `portaljs-new-portal`). - The target dataset already registered in `datasets.json` (see `portaljs-add-dataset`). - `components/ui/parseCsv.ts` present (ships with the template). - Node 18+ and npm available in the portal directory. ## Instructions The canonical, full step-by-step workflow is [`.claude/commands/portaljs-add-chart.md`](https://github.com/datopian/portaljs/blob/main/.claude/commands/portaljs-add-chart.md) — the single source of truth. Read and follow it when executing. Summary: 1. Gather input — dataset slug, X column, Y column(s), chart type (default `line`), portal di
- Overview
- Prerequisites
- Instructions
- Output
- Error Handling
- Examples
- Example 1 — Single line series
- Example 2 — Multi-series bar chart
- Example 3 — Pie chart of a categorical breakdown
- Resources
What does the portaljs-add-chart skill do?
Add a chart (line, bar, area, pie, or scatter) to a dataset's showcase in a PortalJS portal. Installs recharts, writes a reusable Chart component, and renders it in the showcase Views section. Use when visualizing a dataset already registered in datasets.json.
How do I install it?
Run `npx skills add datopian/portaljs --skill portaljs-add-chart --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From datopian/portaljs, a repository with 2,337 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.