fix: handle nested class fields

crates/swc_ecma_transforms_compat/src/class_fields_use_set.rs

@@ -15,6 +15,8 @@ impl VisitMut for ClassFieldsUseSet {
     noop_visit_mut_type!();
 
     fn visit_mut_class(&mut self, n: &mut Class) {
+        n.visit_mut_children_with(self);
+
         let mut fields_handler = FieldsHandler::default();
         n.visit_mut_with(&mut fields_handler);
 

crates/swc_ecma_transforms_compat/tests/class_fields_use_set/basic/4/input.js

@@ -0,0 +1,15 @@
+class Foo {
+    a = 1;
+    #b = 2;
+    static c = 3;
+    static #d = 4;
+
+    foo() {
+        class Bar {
+            a = 1;
+            #b = 2;
+            static c = 3;
+            static #d = 4;
+        }
+    }
+}

crates/swc_ecma_transforms_compat/tests/class_fields_use_set/basic/4/output.js

@@ -0,0 +1,24 @@
+class Foo {
+    #b;
+    static{
+        this.c = 3;
+    }
+    static #d = 4;
+    foo() {
+        class Bar {
+            #b;
+            static{
+                this.c = 3;
+            }
+            static #d = 4;
+            constructor(){
+                this.a = 1;
+                this.#b = 2;
+            }
+        }
+    }
+    constructor(){
+        this.a = 1;
+        this.#b = 2;
+    }
+}