UNDP data viz library

Getting Started

UNDP data viz library is dedicated to providing a good development experience for data visualization specialists. Before starting, it is recommended to learn React first, and correctly install and configure Node.js v18 or above.

We also assumes that you have intermediate knowledge about HTML, CSS, and JavaScript/TypeScript, and React.

Note: The library uses react v19

Detailed documentation can be found here

NPM Package can be found here

Installation

Using npm

npm i @undp/data-viz

Using yarn

yarn add @undp/data-viz

Import

It is recommended to import what you need and the use it. For example, import the HorizontalBarGraph like this:

import { HorizontalBarGraph } from '@undp/data-viz'

It is also recommended to import the css because some setting expect the CSS to be imported to look good. You can import the css file like this:

import '@undp/data-viz/style.css';

TypeScript

UNDP visualization library provides a built-in ts definition, you don't need to install any type definitions.

Dependencies

The dependencies that are pre-installed wit the library:

• Various D3 libraries - For visualizations
  • d3-array
  • d3-delaunay
  • d3-force
  • d3-format
  • d3-geo
  • d3-hierarchy
  • d3-scale
  • d3-selection
  • d3-shape
  • d3-zoom
• Various Lodash libraries - For array and data manipulation
  • lodash.flattendeep
  • lodash.intersection
  • lodash.orderby
  • lodash.sortby
  • lodash.sum
  • lodash.uniqby
• motion - For creating animations in the animated graphs
• papaparse - For loading and parsing csv from links
• simple-statistics - For statistical functions
• xss - For cleaning up cross scripting from user-submitted HTML
• date-fns - For date formatting
• html-to-image - For downloading div as images
• react-csv - For generating a csv file

Required peer dependencies

• React (of course!) (Peer dependency)
• React-dom (of course!) (Peer dependency)
• @undp/design-system-react - For UI elements (Peer dependency)

Optional peer dependencies

• maplibre-gl - For Maplibre maps (Peer optional dependency: only needed when using GeoHub maps)
• pmtiles - For adding pmtiles to Maplibre maps (Peer optional dependency: only needed when using GeoHub maps)
• dnd-kit - For creating comparison maps (Peer optional dependency: only needed when using GeoHub compare maps)
• ajv - For schema validation (Peer optional dependency: only needed when validating schemas for good developer experience)
• dom-to-svg - For downloading div as svg (Peer optional dependency: only needed when using SVG download functionality)
• file-saver - For downloading files (Peer optional dependency: only needed when using XLSX download functionality)
• xlsx - For generating a xlsx file (Optional dependency: only needed when using XLSX download functionality)

How to add a new chart or graph

Adding a new chart or graph to the library requires multiple steps:

• Add the code for the graph to ./src/Components/Elements/Graphs/ folder
• Once the code is done add the id of the graph to either GraphTypeForGriddedGraph or GeoHubGraphType in ./src/Types.tsx depending if you want it to be available in GriddedGraphDashboard or not
• Add the missing settings to GraphSettingsDataType in ./src/Types.tsx
• Add the graph configuration settings in ./src/Utils/transformData/graphConfig.ts
• Add the graph to the list in ./src/Utils/getGraphList.tsx
• Add the file names in the next step to the getDataSchema and getSettingsSchema functions in ./src/Schemas/getSchema.tsx
• Add the graph to the graphComponent and getGraphProps functions in ./src/Components/Dashboard/GraphEl.tsx
• Finally add an export in ./src/index.ts

Adding schema __Schemas are in different repo: undp-viz-library-schema

• Add the data schema for the graph and graph settings schema to the dataSchema folder.
• Also add the missing properties to the SettingSchema in settingSchema folder

Adding documentation and stories in storybook:

• Add a new story in ./src/stories/Graph+Map+Chart folder
• Add a graph name and id to GraphNames in ./src/stories/assets/constants.ts
• Add a config file for the graph in ./src/stories/assets/config folder
• Add the graph in ./src/stories/assets/graphSettingsSelect.ts
• Add the graph in ./src/stories/assets/graphDataConfigSelect.ts