Cannot read properties of undefined (reading 'uploadFile')
I ran into this problem, too. It seemed to happen whenever I started dragging a block's media icon instead of the block text or block container. It seems that the issue was resolved by adding pointer-events: none; to each of my block's media image styles. The image I'm talking about being dragged: In my case:
Read full answer below ↓Question
GrapesJS version
- I confirm to use the latest version of GrapesJS
What browser are you using?
Chrome v96.0.4664.45
Reproducible demo link
https://codesandbox.io/s/react-redux-toolkit-application-forked-l5rhp?file=/src/pages/Editor.js
Describe the bug
How to reproduce the bug?
- Just drag and drop the logo to canvas you should get the error
What is the expected behavior? Drag and drop the logo to canvas
What is the current behavior? I have created a simple custom plugin just a logo , now when I drag and drop to canvas I get the following error Cannot read properties of undefined (reading 'uploadFile')
If is necessary to execute some code in order to reproduce the bug, paste it here below:
import React, { useState, useEffect } from "react";
import { useDispatch } from "react-redux";
import grapesjs from "grapesjs";
import block from "grapesjs-blocks-basic";
const Editor = () => {
const [editor, setEditor] = useState();
const dispatch = useDispatch();
//custom logo plugin
function pageLogo(editor) {
editor.BlockManager.add("logo", {
label: `<div className="gjs-block-label"><img src="https://i.ibb.co/nL2Q7WN/logo.png"></div>`,
content: `<span><img src="https://i.ibb.co/nL2Q7WN/logo.png" /></span>`,
category: {
id: "logo",
label: "Logo",
open: true
}
});
}
useEffect(() => {
const editor = grapesjs.init({
container: "#editor",
storageManager: false,
blockManager: true,
plugins: [pageLogo]
});
setEditor(editor);
}, [dispatch]);
return (
<>
<div className="ModalVideos"></div>
<div id="editor"></div>
</>
);
};
export default Editor;
@artf What am I doing wrong here?
Code of Conduct
- I agree to follow this project's Code of Conduct
Answers (4)
I ran into this problem, too. It seemed to happen whenever I started dragging a block's media icon instead of the block text or block container. It seems that the issue was resolved by adding pointer-events: none; to each of my block's media image styles.
The image I'm talking about being dragged:
In my case:
editor.BlockManager.add('lx-button', {
label: 'LiveX Button',
media: `<img style="width: 32px; height: 32px; filter: invert(0.75); pointer-events: none;" src='https://www.svgrepo.com/show/368574/button.svg' />`,
category: 'LiveX',
content: `
<div class='lx-button normal'>View Details</div>
`,
})
pointer-events: none; is not working for me, I literally have to restart the whole browser in order to make it working normally again.
pointer-events: none;is not working for me, I literally have to restart the whole browser in order to make it working normally again.
@markovic-nikola This Is REALLY IMPORTANT. SUPER THANKS. :D
Thanks for reporting this, @throne1986.
Great question about Cannot read properties of undefined (reading 'uploadFile'). The recommended approach with Canvas is to use the event-driven API.
Start here:
- Check the GrapesJS documentation for your specific module
- Look for the
on()event listener method - 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!
Related Questions and Answers
Continue research with similar issue discussions.
Issue #3806
Target :null when adding video
GrapesJS version [X] I confirm to use the latest version of GrapesJS What browser are you using? chrome new version Reproducible demo link...
Issue #3759
Uncaught TypeError: Failed to execute 'appendChild' on 'Node': parameter 1 is not of type 'Node'.
GrapesJS version[X] I confirm to use the latest version of GrapesJSWhat browser are you using? chrome new versionReproducible demo link htt...
Issue #5378
Uncaught TypeError: Cannot read properties of undefined (reading 'Canvas') while dragging a component in Layer Manager Panel
GrapesJS version [X] I confirm to use the latest version of GrapesJS What browser are you using? Chrome v116.0.5845.97 Reproducible demo li...
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 →Premium plugins ship with support, regular updates, and production-ready features — save days of integration work.
Browse premium plugins →Related tutorials
In-depth guides on the same topic.
Tutorial
Find the Right GrapesJS Plugin in Seconds: Smarter Discovery Is Live
We're shipping a set of discovery upgrades. New label filters, a proper compatibility switch for GrapesJS vs Studio, one-click and a smarter sort bar.
Tutorial
GJS Market 2.0 - Donations, Tracking, Labels and Better Product Discovery
We’ve rolled out a new set of GrapesJS marketplace updates across GJS Market, focused on improving how creators distribute products
Tutorial
Preset DevFuture 2.0 — New Update Released
Preset continues evolving as a clean, production-ready starting point for building visual editors powered by GrapesJS
Browse Plugin Categories
Jump directly to plugin category pages on the marketplace.