JavaScript Reflection Kotlin

JavaScript Reflection

At this time, JavaScript does not support the full Kotlin reflection API. The only supported part of the API is the ::class syntax which allows you to refer to the class of an instance, or the class corresponding to the given type. The value of a ::class expression is a stripped-down KClass and isInstance members.

In addition to that, you can use KClass.js instance corresponding to the class. The JsClass instance itself is a reference to the constructor function. This can be used to interoperate with JS functions that expect a reference to a constructor.

Examples:

class A
class B
class C

inline fun <reified T> foo() {
    println(T::class.simpleName)
}

val a = A()
println(a::class.simpleName)  // Obtains class for an instance; prints "A"
println(B::class.simpleName)  // Obtains class for a type; prints "B"
println(B::class.js.name)     // prints "B"
foo<C>()                      // prints "C"