Notation Stretcher

📖 Document

👀 Notation Likes Rough Notation.

Animation is available for hide() now.

🚀 New Feature:

1. Animate of show() and hide() or not is up to you.
2. Set animation duration whenever call show() and hide()
3. You can stop animation when showing or hidding by calling stop()
4. You can custom a notation shape.

🔧 Changes:

1. Mark name is more easy: 'o' | '_' | '=' | '-' | 'x' | '[]' | 'box' instead of 'circle' | 'underline' | 'highlight' | 'strike-through' | 'crossed-off' | 'bracker' | 'box'