Loading and Parsing CSV Data

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Loading and Parsing CSV Data

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Last edited Mar 18, 2022

Created on Mar 18, 2022

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This example demonstrates how to load and parse CSV data from a remote URL, displaying the file size, row count, and column count in a large text block. The visualization uses `d3.csv` with a Promise to fetch and parse CSS Named Colors data from a GitHub Gist, then reports the results using `d3.csvFormat` to calculate data size. Alternate commented approaches show `fetch` with `async`/`await` and `d3.csvParse`, alongside a nested Promise “pyramid of doom” pattern. The page relies on D3 v5 and raw HTML/CSS for output.

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A program that loads and parses some CSV data: CSS Named Colors.

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