Extension Properties
Understand how to declare and use extension properties in Dart to add new properties to existing types. Learn the syntax for defining extension properties, how to calculate values dynamically, and best practices for static extension methods. This lesson helps you leverage Dart extensions to write cleaner and more expressive code.
We'll cover the following...
Extension Property
Dart provides support for Properties in addition to the methods and operators which we explored in the last few lessons.
In this lesson, we will learn to declare the extension property. We will use the same price list from the previous lessons’ examples.
Example
In this extension, we will add a property to return the total number of printed price labels that are needed for the given price listing. Assume we need to print 3 labels for each price amount in this list [1, 1.99, 4].
Defining:
An extension property definition has three parts: type of data to be returned by the property, the ...