feat(napi-derive): implement instance_of for Class

examples/napi/__test__/typegen.spec.ts.md

@@ -267,6 +267,7 @@ Generated by [AVA](https://avajs.dev).
     }␊
     export class NinjaTurtle {␊
       name: string␊
+      static isInstanceOf(value: unknown): boolean␊
       /** Create your ninja turtle! 🐢 */␊
       static newRaph(): NinjaTurtle␊
       getMaskColor(): string␊

examples/napi/__test__/values.spec.ts

@@ -191,6 +191,7 @@ test('class', (t) => {
   t.is(assets.get(1)?.filePath, 1)
   const turtle = NinjaTurtle.newRaph()
   t.is(turtle.returnThis(), turtle)
+  t.is(NinjaTurtle.isInstanceOf(turtle), true)
 })
 
 test('class factory', (t) => {

examples/napi/index.d.ts

@@ -257,6 +257,7 @@ export class AnimalWithDefaultConstructor {
 }
 export class NinjaTurtle {
   name: string
+  static isInstanceOf(value: unknown): boolean
   /** Create your ninja turtle! 🐢 */
   static newRaph(): NinjaTurtle
   getMaskColor(): string

examples/napi/src/class.rs

@@ -1,5 +1,5 @@
 use napi::{
-  bindgen_prelude::{Buffer, ClassInstance, ObjectFinalize, This, Uint8Array},
+  bindgen_prelude::{Buffer, ClassInstance, ObjectFinalize, This, Uint8Array, Unknown},
   Env, Result,
 };
 
@@ -214,6 +214,11 @@ pub struct NinjaTurtle {
 
 #[napi]
 impl NinjaTurtle {
+  #[napi]
+  pub fn is_instance_of(env: Env, value: Unknown) -> Result<bool> {
+    Self::instance_of(env, value)
+  }
+
   /// Create your ninja turtle! 🐢
   #[napi(factory)]
   pub fn new_raph() -> Self {