Clean Code in JavaScript

Constructor patterns

The Constructor pattern uses a singular constructor and then manually fills its prototype with methods and properties. This was the traditional approach for creating classical OOP-like classes in JavaScript before the class definition syntax existed.

Typically, it begins with the definition of a constructor as a function declaration:

function Book(title) {  // Initialization Logic  this.title = title;}

This would then be followed by assigning individual methods to the prototype:

Book.prototype.getNumberOfPages = function() { /* ... */ };Book.prototype.renderFrontCover: function() { /* ... */ };Book.prototype.renderBackCover: function () { /* ... */ };

Or it would be followed by replacing the entire prototype with an object ...