TypeScript: Fix private class members

Author: fuma-nama

.changeset/khaki-rings-know.md

@@ -0,0 +1,5 @@
+---
+'fumadocs-typescript': patch
+---
+
+Fix private class members

packages/typescript/src/generate/base.ts

@@ -111,12 +111,22 @@ export function generate(
       .getType()
       .getProperties()
       .map((prop) => getDocEntry(prop, entryContext))
-      .filter((entry) => allowInternal || !('internal' in entry.tags)),
+      .filter(
+        (entry) => entry && (allowInternal || !('internal' in entry.tags)),
+      ) as DocEntry[],
   };
 }
 
-function getDocEntry(prop: TsSymbol, context: EntryContext): DocEntry {
+function getDocEntry(
+  prop: TsSymbol,
+  context: EntryContext,
+): DocEntry | undefined {
   const { transform, program } = context;
+
+  if (context.type.isClass() && prop.getName().startsWith('#')) {
+    return;
+  }
+
   const subType = program
     .getTypeChecker()
     .getTypeOfSymbolAtLocation(prop, context.declaration);

packages/typescript/test/index.test.ts

@@ -0,0 +1,79 @@
+import { expect, test } from 'vitest';
+import { generateDocumentation } from '@/generate/base';
+
+test('class members', () => {
+  const out = generateDocumentation(
+    'index.ts',
+    'MyClass',
+    `
+    export class MyClass {
+        #name: string;
+        private test: string;
+        age: number;
+        
+        constructor(name: string) { 
+            this.#name = name;
+        }
+    }
+    `,
+  );
+
+  expect(out).toMatchInlineSnapshot(`
+    [
+      {
+        "description": "",
+        "entries": [
+          {
+            "description": "",
+            "name": "test",
+            "tags": {},
+            "type": "string",
+          },
+          {
+            "description": "",
+            "name": "age",
+            "tags": {},
+            "type": "number",
+          },
+        ],
+        "name": "MyClass",
+      },
+    ]
+  `);
+});
+
+test('interface members', () => {
+  const out = generateDocumentation(
+    'index.ts',
+    'MyInterface',
+    `
+    export interface MyInterface {
+        "#name": string;
+        age: number
+    }
+    `,
+  );
+
+  expect(out).toMatchInlineSnapshot(`
+    [
+      {
+        "description": "",
+        "entries": [
+          {
+            "description": "",
+            "name": "#name",
+            "tags": {},
+            "type": "string",
+          },
+          {
+            "description": "",
+            "name": "age",
+            "tags": {},
+            "type": "number",
+          },
+        ],
+        "name": "MyInterface",
+      },
+    ]
+  `);
+});