Creating Pages from Data Programmatically
Gatsby and its ecosystem of plugins provide all kinds of data through a GraphQL interface. This guide will show how that data can be used to programmatically create pages.
Though you can use any data source you’d like, this guide will show how to create pages from Markdown files (following after the example introduced in earlier guides).
The Gatsby Node API provides the
extension point which you’ll use to add pages. This function will give you
access to the
which is at the core of programmatically creating a page.
For each page you want to create you must specify the
path for visiting that
component template used to render that page, and any
you need in the component for rendering.
context parameter is optional, though often times it will include a
unique identifier that can be used to query for associated data that will be
rendered to the page. All
context values are made available to a template’s
GraphQL queries as arguments prefaced with
$, so from our example above the
slug property will become the
$slug argument in our page query:
createPage action requires that you specify the
that will be used to render the page. Here is an example of what the
referenced template could look like:
Notice that you’re able to query with the
$slug value from your
an argument, which ensures that you’re returning only the data that matches
that specific page. As a result, you can provide the
markdownRemark record to your component. The
are also available as the
pageContext prop in the template component itself.
plugin is just one of a multitude of Gatsby plugins that can provide data
through the GraphQL interface. Any of that data can be used to
programmatically create pages.