TypeError: 'clearTimeout' called on an object that does not implement interface Window

When try to run request for wasm through surf ( code snippet below) and I am getting "clearTimeout' called on an object that does not implement interface Window"
I suspect following could be the issue -
1. Is it because I am using unwrap() on the surf request ?
2. When await.unwrap() change to await? , following errors comes in wasm-pack build
"surf::error does not implement for wasm_bindgen::Jsvalue"

```
#[wasm_bindgen]
pub async fn run() -> Result{

let url = format!("https://api.github.com/repos/{}/branches/master","rustwasm/wasm-bindgen");
web_sys::console::log_1(&url.clone().into()) ;
web_sys::console::log_1(&"build surf request call".into()) ;
let mut res = surf::
get(url)
.header("accept","application/vnd.github.v3+json")
.send()
.await.unwrap();

web_sys::console::log_1(&"finished surf request call".into()) ;
let text = res.body_string().await.unwrap();
// web_sys::console::log_1(&res.toclone().into()) ;
let branch_json: Branch = serde_json::from_str(&text).unwrap();
Ok(JsValue::from_serde(&branch_json).unwrap())
}

```
Error screenshot from browser
```
Source map error: Error: NetworkError when attempting to fetch resource.
Resource URL: webpack:///./node_modules/sockjs-client/dist/sockjs.js?
Source Map URL: sockjs.js.map
https://api.github.com/repos/rustwasm/wasm-bindgen/branches/master wasmexp_bg.js:373:13
build surf request call wasmexp_bg.js:373:13
Uncaught (in promise) TypeError: 'clearTimeout' called on an object that does not implement interface Window.
__wbg_clearTimeout_d8b36ad8fa330187 http://localhost:8080/bootstrap.js:83
__wbg_adapter_29 webpack:///../pkg/wasmexp_bg.js?:272
real webpack:///../pkg/wasmexp_bg.js?:253
promise callback*__wbg_then_a6860c82b90816ca webpack:///../pkg/wasmexp_bg.js?:510
__wbg_then_a6860c82b90816ca http://localhost:8080/bootstrap.js:173
__wbg_adapter_29 webpack:///../pkg/wasmexp_bg.js?:272
real webpack:///../pkg/wasmexp_bg.js?:253
bootstrap.js:83:72
```
[](https://imgur.com/dTIUWK1)

Reproduce the wasm-pack build and browser request using the issue's Rust snippet, then inspect bootstrap.js and the generated wasmexp_bg.js around the clearTimeout bridge. Determine why the surf request fails in the WASM environment and whether the reported error conversion also blocks the build; done means the request completes without the browser TypeError and the example builds.

Written by the indexing model from the issue text.