'card' is never reassigned. Use 'const' instead

'title' is never reassigned. Use 'const' instead

'content' is never reassigned. Use 'const' instead

'exist' is never reassigned. Use 'const' instead

'draggingCard' is never reassigned. Use 'const' instead

'left' is never reassigned. Use 'const' instead

'top' is never reassigned. Use 'const' instead

'draggingCard' is never reassigned. Use 'const' instead

Unsafe usage of optional chaining. If it short-circuits with 'undefined' the evaluation will throw TypeError