Cannot read properties of null (reading 'hasFocus') in Canvas module

GrapesJS version

• I confirm to use the latest version of GrapesJS

What browser are you using?

Chrome (versions 142-144), Safari (versions 16.3, 26.1), Maybe others too

Reproducible demo link

https://jsfiddle.net/saeedhbi/tqfe7p04/

Describe the bug

How to reproduce the bug?

1. Initialize a GrapeJS editor (v0.22.11 or v0.22.14)
2. Before the iframe is fully loaded, press a keyboard shortcut (e.g., Ctrl+Z, Delete, or any command key)
3. Command system calls Canvas.hasFocus() before iframe is ready
4. Observe TypeError: Cannot read properties of null (reading 'hasFocus')

What is the expected behavior? The hasFocus() method should safely handle cases where getDocument() returns null or undefined:

1. Return false when document is unavailable (safe default)
2. Not throw an exception
3. Allow keyboard commands to fail gracefully rather than crash

What is the current behavior? GrapeJS throws a TypeError when the Canvas module's hasFocus() method attempts to call this.getDocument().hasFocus() while the document is null. This occurs when the editor iframe is destroyed, not yet initialized, or during state transitions.

Error messages:

Chrome:

TypeError: Cannot read properties of null (reading 'hasFocus')

Safari:

TypeError: null is not an object (evaluating 'this.getDocument().hasFocus')

Root cause: The Canvas module's hasFocus() method assumes getDocument() will always return a valid document object. However, there are several states where this fails:

1. Iframe not ready - Editor initialized before iframe loads
2. Editor destroyed - User navigates away during async operation
3. Race condition - Keyboard event fires during editor state transition
4. DOM replaced - Iframe replaced while keyboard listener active

Code of Conduct

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