April 2018
Beginner
536 pages
13h 21m
English
We can use a special kind of decorator factory to allow developers to configure the behavior of a decorator. For example, we could pass a string to a class decorator as follows:
@logClass("option")
class Person {
// ...
To be able to pass some parameters to a decorator, we need to wrap the decorator with a function. The wrapper function takes the options of our choice and returns a decorator:
function logClass(option: string) {
return function(target: any) {
// class decorator logic goes here
// we have access to the decorator parameters
console.log(target, option);
};
}
This can be applied to all the kinds of decorators that you learned in this chapter.