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Building Front-End Web Applications with Plain JavaScript

Serialization and Data Management in Model Code

Let’s learn how to write the serialization function and how to perform data management for the application.

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Write a serialization function

The object serialization function toString() now needs to include the values of enumeration attributes.

class Book {
 ...
  toString() {
    return "Book{ ISBN:" + this.isbn + ", title:" + this.title +
      ", originalLanguage:" + this.originalLanguage +
      ", otherAvailableLanguages:" +
      this.otherAvailableLanguages.toString() +
      ", category:" + this.category +
      ", publicationForms:" +
      this.publicationForms.toString() + "}";
  }
 ...
}

Notice that for multi-valued enumeration attributes, we call the toString() function predefined for JS arrays.

Data

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