【Vuejs】 book management use directive and filter

Source Code:
1. List of books
Achieve static list effect
Realize template effect based on data
Process the action buttons for each row
2. Add books
Realize the static effect of the form
Add book form field data binding
Add button event binding
Realize adding business logic
3. Modify the book
Modify the information to fill in the form
Resubmit to the form after modification
Reuse adding and modifying methods
4. Delete the book
Delete button binding time processing method
Implement delete business logic
5. Application scenarios of common features
Filter (formatted date)
Custom instruction (get form focus)
Calculated attributes (counting the number of books)
Listener (verify existence of book and number)
Life cycle (book data processing)
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