Issue #4600πŸ’¬ AnsweredOpened September 20, 2022by Aventrue0 reactions

After Update to 0.20 from 0.19 the error Cannot assign to read only property 'defaults' of object '[object Object]' occurs

Quick answerby collins-lagat

The release says that there a breaking change. Try that and see if the problem goes away. I got the same error but haven't tried the fix yet. https://github.com/artf/grapesjs/releases/tag/v0.20.1

Read full answer below ↓

Question

GrapesJS version

  • I confirm to use the latest version of GrapesJS

What browser are you using?

chrome

Reproducible demo link

none

Describe the bug

image image.js : image

Code of Conduct

  • I agree to follow this project's Code of Conduct

Answers (3)

artfβ€’ September 22, 2022

Yes, as mentioned in the release note you have to switch from the old legacy API for custom component registration.

GJSBlockβ€’ May 17, 2026

Thanks for reporting this, @Aventrue. The issue with After Update to 0.20 from 0.19 the error Cannot assign to read only property 'defaults' of object '[object Object]' occurs appears to be a race condition or state management timing problem. This typically happens when component lifecycle events a...

Related Questions and Answers

Continue research with similar issue discussions.

Paid Plugins That Match This Issue

Curated by issue keywords and label relevance to help you ship faster.

View all plugins

Loading paid plugin recommendations...

Free option

Check the open-source GrapesJS plugins on GitHub or run a quick search in our free catalog.

Browse free plugins β†’
Premium option

Premium plugins ship with support, regular updates, and production-ready features β€” save days of integration work.

Browse premium plugins β†’

Related tutorials

In-depth guides on the same topic.

All tutorials β†’

Browse Plugin Categories

Jump directly to plugin category pages on the marketplace.