Plugins and Themes
Gatsby has a rich ecosystem of drop-in functionality, from CMS integrations to image optimizations.
This section has three parts. First, it covers how to use plugins, which is by far the most common use case. Second, it has documentation on themes, which enable you to modularize and re-use site sections between multiple sites. Third, it provides guides for creating and contributing a plugin to the ecosystem.
Main Guides 5
How to add a plugin to your site→
Like other Node packages, you can install Gatsby plugins using npm or yarn. Then, add it to your `gatsby-config.js` along with values for any options it takes.
How to start a new site with a theme→
The quickest way to get started using a Gatsby theme is to use a starter that’s configured to use the theme.
How to use a theme in an existing site→
Want to add a theme to an existing Gatsby site? No problem! Themes can be installed and configured like other plugins.
How to create a generic plugin→
This guide explains the structure of a Gatsby plugin and the files you need to create one.
How to create a source plugin→
There are currently over 500 source plugins -- basically, integrations between third-party sources (like CMSs) and Gatsby. If you need to integrate with a data source that isn't covered, or improve an existing integration, this guide will help.