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Building Front-End Web Applications with Plain JavaScript

Model Code: Serialization and Data Management

Explore how to add serialization functions and manage data operations such as create, update, and delete with constraint validation in JavaScript model classes. Understand handling errors, maintaining data integrity, and implementing all-or-nothing updates to ensure robust front-end web applications.

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Add a serialization function

It’s helpful to have an object serialization function tailored to the structure of an object (as defined by its class) such that the result of serializing an object is a human-readable string representation of the object showing all its relevant information items. By convention, these functions are called toString().

In the case of the Book class, we use the following code:

Javascript (babel-node)
Book.prototype.toString = function () {
    return "Book{ ISBN:" + this.isbn + ", title:" + this.title +
        ", year:" + this.year + (this.edition || "") + "}";
};

Data management operations

We’ve defined the model class in the form of a constructor function with property definitions, checks, and setters—as well as a toString() serialization function. We also need to ...