CartoDB javascript library
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CARTO.js 4

CARTO.js is a JavaScript library to create custom location intelligence applications that leverage the power of CARTO. It is the library that powers Builder and it is part of the Engine ecosystem.

Getting Started

The best way to get started is to navigate through the CARTO.js documentation site:

  • Guide will give you a good overview of the library.
  • API Reference will help you use a particular class or method.
  • Examples will demo some specific features.
  • Support might answer some of your questions.


We use SemVer for versioning.

Please refer to for a list of notables changes for each version of the library.

You can also see the tags on this repository.

Submitting Contributions

You will need to sign a Contributor License Agreement (CLA) before making a submission. Learn more here.


This project is licensed under the BSD 3-clause "New" or "Revised" License - see the LICENSE.txt file for details.


API Reference

Run npm run docs to build the API reference documentation from jsdoc annotations.

Once the task is done, you can visit docs/public/index.html to check the reference

General documentation

You can read the general documentation that is published at also in this repo. They are written in Markdown.

Warning: internal links in these documents don't work. They are replaced when the documentation is published in


The folder docs/guides contains general information about the CARTO.js library.

  • Quickstart: get started quickly following this tutorial.
  • Upgrade considerations: if you have experience with previous versions of CARTO.js, this is the place to learn the differences between the former library and the newest one.
  • Glossary: terms that appear throughout the documentation.


In the folder examples/public you can find several folders with example for every feature of CARTO.js.

Reference topics

The document docs/reference/ contains general considerations when working with CARTO.js. It's advisable to read them before diving in the API reference.


The folder docs/support contains several document with support documentation: support options, FAQs, error messages...


Run the tests

npm test

Build the library

npm run build

To watch the files

npm run build:watch

Generate the docs

npm run docs

Release version

npm run bump

To publish a release to the CDN and npm

npm run release

Looking for the previous version?

Previous version cartodb.js v3 it's available here