Fetch Js - Async and retry

fetch.js

const fetch = require("node-fetch");

async function fetchAsync (url, type) {
    const init = {
        headers: {
            "content-type": "text/html;charset=UTF-8",
            "User-Agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0"
		}
	}
    
    const response = await fetch(url,init);
    if (type=="json"){
        return await response.json();
	}
	
    else{
        return await response.text();
	}
}


const fetchRetry = async (url, options, attempt) => {
            try {
                const response = await fetch(url, options);

                if(!response.ok) {
                    throw new Error("Invalid response.");
                }
                return response;

            } catch (error) {
                if (attempt <= 1) {
                    throw error;
                }
                await self.sleep(2000);
                return fetchRetry(url, options, attempt - 1);
            }
        };
	
	
module.exports = {fetchAsync, fetchRetry}