Sapna Nagwanshi

@nagwanshi·5 public vizzes

Loading and parsing csv data

This example demonstrates loading and parsing a CSV file of CSS named colors from a remote URL, displaying the resulting data in the browser console. The page fetches the CSV resource using the standard `fetch` API, then parses the response text with `d3.csvParse` from D3 v7 to convert it into an array of JavaScript objects. The parsed data is logged via `console.log`, showing how the library structures tabular data for visualization workflows.

Jan 6, 2023

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Mouse Follower

A glowing circle follows the mouse cursor across a full-screen SVG canvas. The visualization uses React’s `useState` and `useCallback` to track the pointer’s `clientX` and `clientY` coordinates, updating the circle’s `cx` and `cy` attributes in real time. The rendering is done via ReactDOM, with the SVG element’s `onMouseMove` event triggering state updates, while D3.js is loaded but not directly utilized in the interaction logic.

Jan 6, 2023

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Mouse follower

A simple SVG scene contains a single circle, positioned at coordinates (350, 180) with a radius of 50. The page has a hidden overflow and no margin, creating a clean canvas. The visualization does not implement any mouse-tracking or animation logic; it is a static graphic rendered via inline SVG markup. The title suggests a follower, but the code shows only a fixed circle, with no JavaScript or D3 API calls present. The rendering approach is plain HTML/SVG without external libraries.

Jan 6, 2023

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Fork of Loading and Parsing CSV Data

This example demonstrates how to load and parse a CSV file containing CSS named colors, displaying the file size, row count, and column count in a large text output. The code uses D3 v5’s `d3.csv` method with a promise chain to fetch the data from a GitHub Gist URL. It highlights the concise approach of `d3.csv` compared to commented-out alternatives using `fetch`, `async`, and `await`.

Jan 5, 2023

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Smiley face part I

This example renders a classic smiley face as an SVG graphic using React. The face consists of a yellow circle with a black stroke for the head, two small circles for eyes, and a mouth created with a D3 arc path. The code uses ReactDOM to render the SVG elements, while D3's `arc` API defines the mouth's curved shape by specifying inner and outer radii and start and end angles. All visual elements are positioned relative to the center of a 960x500 canvas, and the rendering approach is pure SVG with D3 used for geometry computation.

Jan 5, 2023