The introduction of the **Block Editor** killed all plugins which offered publishing conditions, such as minimum word counts, featured image requirements etc. But the Block Editor *did* introduce the **pre-publish checks**: [![Pre-publish checks][1]][1] Beautiful. How can we disable the `Publish` button until a set amount of conditions have been fulfilled? Examples of four (very) different conditions: 1. Minimum word count (example: 500 words) 2. Min/max tags (example: 3-5 tags) 3. Min category (that isn't `uncategorized`) 4. Featured image is assigned What we have so far ------------------- As expected, the documentation is non-existent. But leads are scattered across the web. In `core/editor`, we can use [.lockPostSaving()][2] to disabled the `Publish` button, and unlock it via `.unlockPostSaving()`. We can add a panel to the pre-publish screen via `PluginPrePublishPanel`. Example (by [MadMaardigan](https://wordpress.stackexchange.com/a/334671/24875)): var PluginPrePublishPanel = wp.editPost.PluginPrePublishPanel; var registerPlugin = wp.plugins.registerPlugin; function Component() { // lock post saving wp.data.dispatch('core/editor').lockPostSaving() // unlock post saving // wp.data.dispatch('core/editor').unlockPostSaving() return wp.element.createElement( PluginPrePublishPanel, { className: 'my-plugin-publish-panel', title: 'Panel title', initialOpen: true, }, 'Panel content' ); } registerPlugin( 'my-plugin', { render: Component, }); It works: [![Custom pre-publish panel][3]][3] We also have great discussions on GitHub: [#7020](https://github.com/WordPress/gutenberg/issues/7020), [#7426](https://github.com/WordPress/gutenberg/issues/7426), [#13413](https://github.com/WordPress/gutenberg/issues/13413), [#15568](https://github.com/WordPress/gutenberg/issues/15568), [#10649](https://github.com/WordPress/gutenberg/issues/10649)... [1]: https://i.sstatic.net/zwGUd.png [2]: https://developer.wordpress.org/block-editor/data/data-core-editor/#lockPostSaving [3]: https://i.sstatic.net/SuFJ5.png