Christopher Cleland

@Cleland32base·6 public vizzes

Fork of Rendering Data with React & D3

This example displays CSS named colors as a vertical sequence of stacked horizontal bars, each colored by its corresponding hex value from a CSV dataset. The visualization loads data asynchronously using D3’s `csv` utility and manages the fetch state with React hooks (`useState`, `useEffect`), rendering a loading message until data arrives. React maps over the parsed CSV rows to produce the colored div elements, combining D3’s data-loading with React’s declarative component rendering.

Sep 12, 2021

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Rendering Data with React & D3

This example demonstrates how React and D3 can work together by rendering a vertical striped chart from CSS named color data. The visualization displays each color as a horizontal bar, with the entire dataset filling the screen. It uses D3's `csv` function to load external data, React's `useState`, `useEffect`, and `useCallback` hooks to manage asynchronous loading and state, and React DOM to render the color-coded div elements.

Sep 12, 2021

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Loading and Parsing CSV Date

This example demonstrates the loading and parsing of a CSV file containing CSS named colors. It displays the file size in kilobytes, the number of rows, and the number of columns in a large `<pre>` element. The code uses `d3.csv` to fetch the data from a GitHub gist and `d3.csvFormat` to measure the formatted string’s length. The page loads D3 v7 from a CDN and updates the message container via `textContent`.

Sep 12, 2021

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Mouse Follower

This example shows a single circle that follows the mouse cursor across an SVG canvas. Built with React and D3 v5, it uses React’s `useState` hook to track the cursor’s clientX and clientY coordinates on every `mousemove` event, then re-renders the circle’s `cx` and `cy` attributes to match. The `useCallback` hook memoizes the event handler, and the initial mouse position is set to the canvas center. The rendering uses ReactDOM to mount the SVG, with no external data source.

Sep 12, 2021

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Smiley Face

A grid of eighteen smiley faces renders in React, each with randomized eye and mouth dimensions. The visualization shows how reusable SVG components—BackgroundCircle, Eyes, and Mouth—compose with D3’s `arc()` generator to create the mouth path. A FaceContainer wraps the group with a centered translation, while the code uses the `range()` iterator from D3 to generate repeated faces. All geometry is drawn as SVG circles and paths, with yellow fill, black stroke, and variable stroke widths, highlighting component-driven parametric design in a static, non-interactive layout.

Sep 12, 2021

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Smiley Face

A yellow circle with two smaller black circles forms a simple smiley face, centered within a 960-by-500 SVG canvas. The face itself is rendered as a primary `<circle>` element with a yellow fill and black stroke, while the eyes are separate black-filled `<circle>` elements positioned symmetrically. The example uses raw SVG markup directly in the HTML file, with no JavaScript libraries or data sources, relying solely on static circle coordinates and styling to achieve the composition. This minimal implementation demonstrates basic SVG shape and attribute usage without external dependencies.

Sep 8, 2021