v3 Release Notes
email@example.com release (March 2021 #1).
Key highlights of this release:
- Incremental Builds in OSS - regenerate HTML only when necessary, leading to faster builds
- Fast Refresh - new hot-reloading engine, error recovery, better DX
- firstname.lastname@example.org - brand-new, significantly improved integration with WordPress
- Miscellaneous changes in plugins
Major dependency updates:
Also check out notable bugfixes and improvements.
Bleeding Edge: Want to try new features as soon as possible? Install
gatsby@next and let us know
if you have any issues.
If you’re looking for an overview of all breaking changes and how to migrate, please see the migrating from v2 to v3 guide.
Gatsby v2 introduced experimental “Conditional Page Builds” (enabled by
GATSBY_EXPERIMENTAL_PAGE_BUILD_ON_DATA_CHANGES environment variable). It had some gotchas and quirks, and it wasn’t ready yet for GA. With Gatsby v3, we improved this feature and activated it by default for everyone! So incremental builds is available in OSS now. This improvement is (re)generating only subset of HTML files that needs to be generated. To be able to use it you will need to keep the
public directories from previous builds.
Take a project powered by Shopify as an example. You have your listing of all products and then individual product pages. When you change one single product, only that page should be rebuilt. In the screenshot below you can see exactly that (the sentence “Hello World” was added to the description):
Gatsby tracks “inputs” when generating HTML files. In particular we track:
- which page template the page is using
- result of page query
- results of static queries used by a page template
- frontend source code (shared and also browser
When those inputs change since the last build, the HTML files are marked to be regenerated. If they don’t change, we can reuse HTML files generated in previous build.
As we mentioned, Gatsby tracks “inputs” used to generate HTML files. However, the
gatsby-ssr file allows some arbitrary code execution like using the
fs module. For example:
While Gatsby could also track files that are read, the custom code that does those reads might have some special logic that Gatsby is not aware of. In the above example the filename could be generated and changed between builds, or the file read itself could change — so we see this as “arbitrary” file reading. If Gatsby discovers that
fs modules are used, it will disable “Incremental Builds”-mode to stay on the safe side (there will be warnings mentioning “unsafe builtin method”).
gatsby-ssr (either site itself or plugin) make use of
fs reads, head over to migrating from v2 to v3 guide and check how to migrate.
After adding our initial Fast Refresh integration back in November 2020, we worked on it over the last couple of releases. For Gatsby v3 we further improved usability, reliability, and accessibility to make it the default overlay. With this the old
react-hot-loader is removed and you can benefit from all the new features it has: Fast Refresh is faster, handles errors better, and preserves state across re-renders.
Here’s a preview:
We built a custom error overlay that aims to give you helpful information to fix your bugs more quickly. It features:
- A clear indication whether it’s a runtime error, compile error, or GraphQL error
- Source code snippets that you can open in your editor with the press of a button
- The exact error location, including the original line and column
- The overlay automatically goes away once you fix the error
We also added two new ESLint rules inside the default configuration that will warn you against anti-patterns in your code:
- No anonymous default exports
- Page templates must only export one default export (the page) and
queryas a named export
Visit the Fast Refresh reference guide to learn more.
We are dropping support for Node 10 as it is approaching maintenance EOL date (2021-04-30).
The new required version of Node is
12.13.0. See the main changes in Node 12 release notes.
Check Node’s releases document for version statuses.
Please refer to the webpack release notes for a full list of changes.
Key changes in the new webpack version:
- Improved build performance with Persistent Caching
- Improved Long-Term Caching with better algorithms and defaults
- Improved bundle size with better Tree Shaking and Code Generation
- Improved compatibility with the web platform
- Cleaned up internal structures
What does that mean for your Gatsby site? Gatsby is now able to tree-shake on a page level instead of an app level. You’ll see reductions up to 20% on file size. Users returning to your site will benefit from the improved hashing algorithms as unchanged files will be loaded from the browser cache.
We’ve tried to protect you from the burden of manual webpack migration, but if you are using a custom webpack config or community plugins that do not support webpack 5 yet, you may find the webpack migration guide useful.
Please refer to React’s own release notes for a full list of changes.
The minimum version of Gatsby is now 16.9.0 to support Fast Refresh, React Hooks, and Suspense by default. We’ve also made sure we’re 100% compatible with React 17. To use the new React JSX transform have a look at the
babel-preset-gatsby section below.
Please refer to
graphql-js’s own release notes for a full list of changes.
With this upgrade we can finally leverage interface inheritance for queryable interfaces.
You no longer need to use
@nodeInterface directive in schema customization:
Also, Gatsby now displays GraphQL deprecations as CLI warnings. Example output:
Please refer to
eslint’s own migration guide to update your custom ESLint files.
If you rely on Gatsby’s default ESLint configuration, you should have a smooth transition. We upgraded the underlying rules, so you might get some new warnings/errors.
Gatsby no longer uses the deprecated
eslint-loader. We’ve moved to
eslint-webpack-plugin. By using the plugin, behaviour has changed a little bit, as warnings and errors are displayed later than in version 2.
This release includes a new plugin,
gatsby-plugin-image, replacing the old
gatsby-image plugin. Built from the ground up for speed and best practices, it’s the most performant way to use images in React. If you saw your scores drop with recent Lighthouse updates, migrating to this plugin should help you get top scores again. It comes with a new, simplified GraphQL API (no more fragments), as well as a new
StaticImage component that’s as easy to use as an
GatsbyImage component supports three responsive layout types, as shown in the video below.
There is a codemod available to help migrate from
gatsby-image. Support is included in all sources that use
childImageSharp, as well as out of the box support in several CMS plugins, with more coming soon.
For more information, see:
- Migrating from gatsby-image to gatsby-plugin-image
- How-To Guide: Using gatsby-plugin-image
- Reference Guide: Gatsby Image plugin
- GatsbyConf: Announcing gatsby-plugin-image
Recently we’ve announced the brand-new WordPress integration. Refer to this post on the Gatsby Blog for the full details: Announcing Gatsby’s New WordPress Integration
The originally published version of renewed
4.0.0. It is
fully compatible with Gatsby v2.
For Gatsby v3 bump we’ve also bumped
5.0.0. It should
be a straight-forward update from
gatsby-source-wordpress@^4.0.0. No additional changes
from you are required.
- Fixed a bug where adding a post type named “Filter” would break options queries PR #29718
- Fixed an HTML field
gatsby-imageregression that would prevent image transforms in certain situations PR #29778 and PR #29813
- Migrated to the latest Contentful SDK, via PR #29520
- Compatibility with
- Retries when downloading assets
- Retries on network errors
Gatsby Cloud now includes Hosting for all your Gatsby projects.
gatsby-plugin-gatsby-cloud is a new plugin that you need to install when using Gatsby Cloud Hosting. It generates redirects and rewrites for your client side routes automatically and even allows you to set custom Headers on a per-file basis.
If you’re using Gatsby v2 please install
gatsby-plugin-gatsby-cloud@^1.0.0. For Gatsby v3 we’ve bumped
2.0.0. It should
be a straight-forward update, no additional changes from you are required.
Read more about
gatsby-plugin-gatsby-cloud at the README.
babel-preset-gatsby now accepts
reactImportSource which is passed to the underlying
@babel/preset-react importSource field. Note that this field is only supported when
automatic. It is
classic by default.
Configuration looks like this.
The plugin is deprecated. It is not compatible with Gatsby v3.
When using the
tableOfContents functionality, the defaults have changed.
absolute now defaults to
pathToSlugField defaults to an empty string.
ScrollContainer, previously deprecated, has now been removed. Please use the
useScrollRestoration hook instead.
fetchRemoteNode utility (supersedes file download utils from
gatsby-source-filesystem) via PR #29531
topLevelImportPaths option, via PR #29544
Add plugin options validation to
gatsby-plugin-canonical-urls, via PR #29688
terminal-linkfrom our CLI as in some terminals it turned lines blank, via PR #29472
- Update the
gatsby-plugin-feed, via PR #29616
- Cache AVIF images in
gatsby-plugin-offline, via PR #29394
- Improve efficiency when writing HTML files to disk, via PR #29219
- 10-20% faster sourcing by memoizing actions when running plugins, via PR #29240
- Do not miss page invalidations when using
runQueryin custom resolvers, via PR #29392
- Upgrade TypeScript to 4.0, via PR #29388
A big Thank You to our community who contributed to this release 💜
- lokesh-coder: chore(docs): Fix typo in contributing style guide PR #29262
- domvo: fix(gatsby-plugin-sharp): make sure to pass the failOnError option to base64 generation PR #29254
- feat(contentful): add retry logic to asset downloading PR #29268
- feat(gatsby-source-contentful): improve Contentful image handling PR #29398
- fix(contentful): fix import PR #29522
- fix(contentful): retry on network errors when checking credentials PR #29664
- chore(gatsby-source-contentful): migrate to latest Contentful SDK PR #29520
- louis-morgan: chore(gatsby-source-wordpress): Update querying-data tutorial PR #29353
- deraru: chore(docs): Fix product slugs for building-an-ecommerce-site-with-shopify page PR #29292
- meeroslav: docs(wordpress): fix broken assets link after migration PR #29389
- zonayedpca: chore(docs): Remove extra curly brace PR #29405
- geekster909: docs(gatsby-source-wordpress): fix back to readme.md link PR #29468
- isabelleingato: docs(gatsby-plugin-netlify): Update readme PR #29168
- astrokd: chore(docs): Update sourcing-from-json-or-yaml PR #29488
- docs: fix spelling PR #29494
- docs: remove unneeded whitespace from Markdown link PR #29582
- docs: fix spelling PR #29581
- fix(gatsby-recipes): change ‘Typescript’ to ‘TypeScript’ PR #29587
- fix(gatsby-source-wordpress): remove hard tabs from Markdown PR #29627
- chore(docs): remove unneeded whitespace before commas and full stops PR #29629
- rogermparent: Fix URL typo in sass recipe PR #29530
- gregberge: fix(gatsby-plugin-styled-components): Support
topLevelImportPathsoption PR #29544
- strategore: chore(docs): Update Directus plugin link PR #29533
- jasonbahl: Update graphql-wordpress-and-gatsby.md PR #29558
- bryndyment: chore(docs): Fix caching typo PR #29578
- mareksuscak: Update the changelog of Contentful plugin to show a working example PR #29579
- kdwarn: chore(docs): Add note on reloading bash configuration. PR #29613
- frederickfogerty: chore: improve description of placeholder parameter PR #29670
- odkpatrick: chore(docs): Updated gatsby-for-ecommerce PR #29676
- lwz7512: fix(gatsby-source-wordpress):issue #29535 not finished createSchemaCu… PR #29554
- stefanprobst: fix(gatsby): fix regex filter in graphql queries PR #26592
- kartikcho: fix(gatsby): context.nodeModel.runQuery should return  instead of null PR #25885
- hendra-go: Update index.js PR #29758
- hiad: fix(gatsby-plugin-feed): Exists function and update version fs-extra PR #29616
- disintegrator: feat(babel-preset-gatsby): allow setting importSource on preset-react PR #29260
- herecydev: fix(gatsby): Add dir=ltr to Fast Refresh overlay PR #29900