Refactoring a Bar Chart with React & D3

Refactoring a Bar Chart

This example refactors a bar chart into modular React components, displaying the populations of the top ten countries from UN Population 2019 data. The visualization uses SVG rendering, with separate components for the bottom and left axes, and marks for the bars. D3’s `scaleBand` and `scaleLinear` handle the axis scales, while React hooks (`useState`, `useEffect`) manage the asynchronous loading of the CSV data via D3’s `csv` utility.

Llefat92

Refactored Bar Chart

This example visualizes the population of the top 10 countries from UN Population 2019 data as a horizontal bar chart. The chart uses D3 scales (`scaleBand` and `scaleLinear`) to position bars and axes, while React components render the SVG elements. The code separates AxisBottom, AxisLeft, and Marks into distinct React components, uses a custom `useData` hook to load and parse the CSV with d3.csv, and supports blank ticks as axis labels. The visualization highlights a modular, refactored approach to building reusable chart components.

SSai Phaltankar

refactor bar chart

This example visualizes the top 10 most populous countries as a horizontal bar chart, with country names on the y-axis and population values on the x-axis, rendered as SVG via React components. The chart uses `d3.scaleBand` and `d3.scaleLinear` to map data from the United Nations World Population Prospects 2019 dataset. Axis and mark components are split into separate React files, with `Marks.js` drawing rectangles and `AxisBottom` and `AxisLeft` adding ticks and labels, demonstrating a refactored modular architecture.

NNart Williamson

Refectoring a Bar Chart

A bar chart displays the top 10 countries by population from a United Nations dataset loaded via `d3.csv`. React components render the SVG axes and bars, with scales created using `d3.scaleBand` and `d3.scaleLinear`. The chart is refactored into reusable modules for the bottom axis, left axis, and marks, demonstrating a clean separation of visualization logic.

TtrwMK

Refactor bar chart

This example displays a horizontal bar chart of population data for the top 10 countries from a UN 2019 dataset, rendered as SVG elements within a React component. The code uses d3-scale's `scaleBand` and `scaleLinear` to map country names and population values to screen coordinates, while `AxisBottom` and `AxisLeft` generate the tick marks and labels using D3's tick system. Bars are drawn as `rect` elements via the `Marks` component, with width proportional to each country's population. Data is fetched asynchronously using the `csv` function from D3 v6.

Ssurikmeetr

Making a Bar Chart with React & D3

This example demonstrates a bar chart visualizing the top 10 most populous countries from a 2019 UN population dataset. The chart uses React state to manage the fetched CSV data and renders an SVG visualization via D3 scales, including labeled tick marks for both axes. The code leverages `d3.csv`, `d3.scaleBand`, and `d3.scaleLinear` for data loading and positioning, while React's `useState` and `useEffect` hooks handle data retrieval and conditional rendering. The bars are drawn as SVG rectangles sized proportionally to population values.

MMinh Luong

Making a Bar Chart with React & D3

This example shows how to build a bar chart with React and D3, displaying the top 10 countries by population from a 2019 UN dataset. The chart renders SVG rectangles, with countries on the y-axis using `scaleBand` and population values on the x-axis using `scaleLinear`. The data is loaded asynchronously via `d3.csv`, and React state manages the loading and storage of the parsed dataset. The visualization demonstrates a clean separation of concerns, where D3 handles scales and data loading while React manages component rendering and state updates.

MMGamboa

D3 Bar Chart (Refactoring React)

This visualization presents a horizontal bar chart of the ten most populous countries in 2020, using data from the UN Population dataset. It showcases a refactoring pattern where D3’s scale functions and tick generation are used within React components to render SVG elements. The code demonstrates using `d3.scaleBand` and `d3.scaleLinear` for axes and bar positioning, while custom React components like `AxisBottom`, `AxisLeft`, and `Marks` encapsulate SVG line, text, and rect elements. The rendering is pure SVG, dynamically generated from a CSV file via `d3.csv`.

ZZoe Ferencova