[Refactoring] Make util from the ModificationObserver module

Description

This issue does not include a description.

Contributor guide

Tech stack

typescript

Domain

frontend

Issue type

refactor

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

half day

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

fresh

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

mostly clear

Prerequisites

Familiarity with editor.js codebaseUnderstanding of the ModificationObserver module

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

60

Research direction

First, find the ModificationObserver module in the codebase to understand its current structure and responsibilities. Then, identify the utility functions within it that can be extracted into a separate util module. Review similar refactoring patterns in the project for consistency. After extraction, ensure all imports are updated and tests pass.