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Last edited Mar 28, 2018

Created on Mar 28, 2018

This example loads three separate JSON data files and uses `Promise.all` to wait for all asynchronous `d3.json` requests to resolve before proceeding. Once all files are fetched, it logs the combined array of parsed data objects to the browser console, demonstrating how to coordinate multiple data loads with D3 v5. The code relies on the native JavaScript Promise API rather than any custom visualization or rendering, and the visible data source is three small JSON files containing simple `foo` and `bar` numeric properties.

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