June 2026
Intermediate to advanced
582 pages
16h 16m
English
Content preview from Learn D3.js - Second Edition
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5
Loading and Parsing Data
Most of the data used in your D3 visualizations will probably be loaded from external sources. This chapter explores tools provided by D3 that you can use to asynchronously load and parse data, converting it to a native format that can be manipulated in JavaScript and used in a web-based data visualization.
JSON and XML sources have a hierarchical structure. Once loaded, they can be parsed using native code, but D3 provides functions to efficiently load and parse them in a single step, returning JavaScript promises. These functions are part of the d3-fetch module, which also provides asynchronous loaders and parsers for CSV, plain text, and binary data.
If you need more control, D3 provides additional support for tabular ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.