0.18.2 / 0.18.3 removes all on... HTML attributes when block is drag-dropped in the builder

That is the expected behaviour as stated in the release notes for 0.18.2

Correct. In case you need to enable unsafe attributes (at your own risk), you can do it via config.parser.optionsHtml.allowUnsafeAttr option.

Thanks for reporting this, @varadero.

Great question about 0.18.2 / 0.18.3 removes all on... HTML attributes when block is drag-dropped in the builder. The recommended approach with GrapesJS is to use the event-driven API.

Start here:

1. Check the GrapesJS documentation for your specific module
2. Look for the on() event listener method
3. Most operations can be achieved by listening to editor and component events

Common patterns:

// Listen for changes
editor.on('change', () => console.log('something changed'));

// Component lifecycle
editor.on('component:mount', (c) => console.log('component ready', c));
editor.on('component:update', (c) => console.log('component updated', c));

If you're still stuck:

• Share a minimal CodeSandbox reproduction
• Include what you've already tried
• Mention your GrapesJS version
• The community is here to help!