---
source: crates/biome_js_analyze/tests/spec_tests.rs
expression: valid.ts
---
# Input
```ts
/* should not generate diagnostics */

import { useEffect } from "react";

// capturing declarations
function overloaded(s: string): string;
function overloaded(s?: string) {
  return s;
}

enum A { B = 1 }
abstract class C { static D = 1 }
class D {
    constructor() {

    }
}

declare module M {
    function f();
}

function MyComponent() {
    useEffect(() => {
        overloaded("");
        console.log(A.B);
        console.log(C.D);
        console.log(new D());
        console.log(M.f());
    }, []);
}

// Capturing an object property with optional chaining
export function MyComponent2() {
    let selectedArticle: { redirectUrl: string } | undefined;

    useEffect(() => {
        if (selectedArticle?.redirectUrl) {}
    }, [selectedArticle?.redirectUrl]);
}

// Excludes captures from TS typeof
export function MyComponent3({ outer }: { outer: string[] }) {
		useEffect(() => {
			const a: (typeof outer)[number] = "foo";
			console.log(a)
		}, []);
}

```