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Learn JS Data
This guide teaches JavaScript data processing and cleaning, including loading, modifying, and transforming data.
About Learn JS Data
Learn JS Data is a guide to manipulating data with JavaScript in the browser or in Node.js to prepare data for analysis and visualization. It demonstrates techniques using the core JavaScript API, the d3.js library and lodash.
It covers tasks such as reading, combining, summarizing, grouping and checking data. It assumes the reader already has some basic knowledge of JavaScript.
Key features
- Reading in data
- Combining data
- Summarizing data
- Nesting and grouping data
- Working with strings and regular expressions
- Working with time
Best for: People with basic JavaScript knowledge who want to prepare data for analysis and visualization.
Good for
- Covers JavaScript in the browser and in Node.js
- Demonstrates core JavaScript API, d3.js and lodash
- Provides an Observable version for interactive use
Watch out for
- Requires basic knowledge of JavaScript
Learn JS Data at a glance
- Website
- learnjsdata.com
- Category
- Education & Learning › Learn to Code
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Open source
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Learn JS Data FAQ
Do I need prior JavaScript knowledge to use this guide?
Yes, the guide assumes you already have some basic knowledge of JavaScript.
Does the guide cover Node.js?
Yes, it covers JavaScript in the browser or in Node.js and includes a Using Node section.
Is there an interactive version of the guide?
Yes, an Observable version of the guide is available.
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Tell us and an editor will check it.
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