Jacob Fletcher 67fa5a0b3b fix(live-preview): foreign postMessage events reset client-side state (#12925)
Needed for #12860.

If the admin panel broadcasts foreign postMessage events, i.e. those
without the `payload-live-preview` signature, client-side live preview
subscriptions will reset back to initial state.

This is because we dispatch two postMessage events in the admin panel,
one for client-side live preview to catch (`payload-live-preview`), and
the other for server-side live preview (`payload-document-event`). This
was not previously noticeable because both events would only get called
simultaneously on initial render, where initial state is already the
expected result.

Now that Live Preview can be freely toggled on and off, both events are
frequently dispatched and very obviously disregard the current working
state.

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Payload headless CMS Admin panel built with React

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Important

🎉 We've released 3.0! Star this repo or keep an eye on it to follow along.

Payload is the first-ever Next.js native CMS that can install directly in your existing /app folder. It's the start of a new era for headless CMS.

Benefits over a regular CMS

  • Deploy anywhere, including serverless on Vercel for free
  • Combine your front+backend in the same /app folder if you want
  • Don't sign up for yet another SaaS - Payload is open source
  • Query your database in React Server Components
  • Both admin and backend are 100% extensible
  • No vendor lock-in
  • Never touch ancient WP code again
  • Build faster, never hit a roadblock

Quickstart

Before beginning to work with Payload, make sure you have all of the required software.

pnpx create-payload-app@latest

If you're new to Payload, you should start with the website template (pnpx create-payload-app@latest -t website). It shows how to do everything - including custom Rich Text blocks, on-demand revalidation, live preview, and more. It comes with a frontend built with Tailwind all in one /app folder.

One-click templates

Jumpstart your next project by starting with a pre-made template. These are production-ready, end-to-end solutions designed to get you to market as fast as possible.

🌐 Website

Build any kind of website, blog, or portfolio from small to enterprise. Comes with a fully functional front-end built with RSCs and Tailwind.

We're constantly adding more templates to our Templates Directory. If you maintain your own template, consider adding the payload-template topic to your GitHub repository for others to find.

Features

Request Feature

🗒️ Documentation

Check out the Payload website to find in-depth documentation for everything that Payload offers.

Migrating from v2 to v3? Check out the 3.0 Migration Guide on how to do it.

🙋 Contributing

If you want to add contributions to this repository, please follow the instructions in contributing.md.

📚 Examples

The Examples Directory is a great resource for learning how to setup Payload in a variety of different ways, but you can also find great examples in our blog and throughout our social media.

If you'd like to run the examples, you can use create-payload-app to create a project from one:

npx create-payload-app --example example_name

You can see more examples at:

🔌 Plugins

Payload is highly extensible and allows you to install or distribute plugins that add or remove functionality. There are both officially-supported and community-supported plugins available. If you maintain your own plugin, consider adding the payload-plugin topic to your GitHub repository for others to find.

🚨 Need help?

There are lots of good conversations and resources in our Github Discussions board and our Discord Server. If you're struggling with something, chances are, someone's already solved what you're up against. 👇

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👏 Thanks to all our contributors

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