Pasting code block renders [object HTMLPreElement] instead of code content

[prathmeshyelne]

When pasting a code block into the editor, the content is inserted but rendered incorrectly as:

[object HTMLPreElement]

instead of displaying the actual code.

Steps to Reproduce

1. Open the editor.
2. Copy the following code:

import EditorJS from '@editorjs/editorjs'

const editor = new EditorJS({
  tools: {
    // ... your tools
  }
})

3. Paste the code into the editor.
4. Observe the rendered result.

Actual Result

The editor displays:

[object HTMLPreElement]

instead of the pasted code.

Expected Result

The editor should preserve and display the pasted code content:

import EditorJS from '@editorjs/editorjs'

const editor = new EditorJS({
  tools: {
    // ... your tools
  }
})

or create a proper Code block containing the pasted content.

Environment

• Editor.js Version: v2.31.6
• Browser: Chrome
• OS: macOS

Screenshot :

Issue Video :

Screen.Recording.2026-06-13.at.8.35.44.PM.mov