Uncaught TypeError: Cannot read properties of undefined (reading 'Canvas') while dragging a component in Layer Manager Panel
I downgraded to v0.21.4 and I don't have the issue anymore, so this is only occurring on the latest version available.
Read full answer below βQuestion
GrapesJS version [X] I confirm to use the latest version of GrapesJS What browser are you using? Chrome v116.0.5845.97 Reproducible demo link https://grapesjs.com/demo.html Describe the bug How to reproduce the bug?Select any component from the canvasOpen the Layer Manager PanelSelect the first "Section" componentUse the arrow to move the section and change the order What is the expected behavior? The section should move the the new position What is the current behavior? The console is throwing an error Uncaught TypeError: Cannot read properties of undefined (reading 'Canvas') and Uncaught Ty...
Answers (4)
I downgraded to v0.21.4 and I don't have the issue anymore, so this is only occurring on the latest version available.
Having the same issue in the simplest examples. Downgrading do .4 makes it go away. Regression?
Yeah fixed already here. I'll push a new release for the end of this week.
Thank you for reporting this issue. I can confirm the bug as described, and it is reproducible on the official GrapesJS demo (https://grapesjs.com/demo.html) using Chrome v116.0.5845.97, as well as other modern browsers. Root Cause The Uncaught TypeError: Cannot read properties of undefined (readin...
Related Questions and Answers
Continue research with similar issue discussions.
Issue #5355
On move layer
GrapesJS version [X] I confirm to use the latest version of GrapesJS What browser are you using? Chrome 116 Reproducible demo link https://...
Issue #5633
Cannot select component in ``component:remove`` handler
GrapesJS version [X] I confirm to use the latest version of GrapesJS What browser are you using? Chrome Version 120.0.6099.225 Reproducible...
Issue #5342
ScrollCanvas doens't work
GrapesJS version [X] I confirm to use the latest version of GrapesJS What browser are you using? Firefox 116.0.3 Reproducible demo link htt...
Issue #6705
TypeError: Cannot read properties of undefined (reading 'toLowerCase') in keyboard handler
GrapesJS version [x] I confirm to use the latest version of GrapesJS What browser are you using? All browsers (Chrome, Safari, Firefox, Edg...
Paid Plugins That Match This Issue
Curated by issue keywords and label relevance to help you ship faster.
Loading paid plugin recommendations...
Check the open-source GrapesJS plugins on GitHub or run a quick search in our free catalog.
Browse free plugins βPremium plugins ship with support, regular updates, and production-ready features β save days of integration work.
Browse premium plugins βRelated tutorials
In-depth guides on the same topic.
Tutorial
UnStudio for GrapesJS: 4 Plugins to Build Better Visual Editors
Meet UnStudio, a new GrapesJS plugin studio with four tools, safer and better editor: Command Palette, Responsive Pack, Autosave & Restore, and Autofill
Tutorial
Claude Skill for GrapesJS: How AI Is Changing the Way We Build Visual Editors
We've released the Claude Skill for GrapesJS Development β a free, open-source skill that turns Claude into a developer who actually knows GrapesJS
Tutorial
Vanilla GrapesJS vs GrapesJS With Plugins: What You Actually Get Out of the Box (2026)
New to GrapesJS? See exactly what the stock editor gives you, where it falls short, and which plugins close the gaps β a beginner-friendly 2026 comparison
Browse Plugin Categories
Jump directly to plugin category pages on the marketplace.