From where is the value of this parameter coming?

Here is the code snippet I'm working with: https://jsfiddle.net/toddmotto/qaqeapn6/ I'm curious to know where the value for the 'target' parameter in the function is coming from. function (target)

Answer №1

This class is adorned with decorations

Decorating a class involves attaching a special declaration known as a Decorator to the class declaration, method, accessor, property, or parameter. Decorators are denoted by using the @expression syntax, where expression must resolve to a function that will be executed at runtime and provide details about the decorated declaration.

For more information, please visit https://www.typescriptlang.org/docs/handbook/decorators.html

Answer №2

One interesting aspect of Class Decorators is that they are an internal feature within ES2016. These decorators operate on property descriptors and classes, receiving property names and the target object automatically. This access to the descriptor enables decorators to modify properties, such as converting a property to use a getter function. This functionality simplifies tasks like binding methods to the current instance upon first property access.

To delve deeper into this topic, you can check out: https://medium.com/google-developers/exploring-es7-decorators-76ecb65fb841#.qj8979jae

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