Step 6: Implement the Update Use Case

Let’s learn how to implement the update use case for the web application.

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For the “Update” use case, we have an HTML page for the user interface (updateBook.html) and a view code file (src/v/updateBook.js).

The HTML form for the UI of the “update book” operation has a selection field to choose the book to be updated, an output field for the standard identifier attribute isbn, and an input field for each attribute of the Book class that can be updated.

Notice that because we used an output field for the standard identifier attribute, aren’t able to change the standard identifier of an existing object.

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Introduction

The Foundations of Web Apps

Javascript Fundamentals

Building a Minimal Web App with Plain JS in Seven Steps

Integrity Constraints and Data Validation

Constraint Validation in Plain JS

Enumerations

Enumeration Attributes in Plain JS

Reference Properties and Unidirectional Associations

Implementing Unidirectional Functional Associations

Implementing Unidirectional Non-Functional Associations

Bidirectional Associations

Implementing Bidirectional Associations

Subtyping and Inheritance

Subtyping with Plain JS

Conclusion

Step 6: Implement the Update Use Case

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