node-fetch with retry

main.js

const fetch = require('node-fetch')

const delay = (ms) => {
    return new Promise(resolve => {
        setTimeout(() => {
            resolve()
        }, ms)
    })
}
const retryFetch = (url, fetchOptions={}, retries=3, retryDelay=1000) => {
    return new Promise((resolve, reject) => {
        const wrapper = n => {
            fetch(url, fetchOptions)
                .then(res => { resolve(res) })
                .catch(async err => {
                    if(n > 0) {
                        // console.log(`retrying ${n}`)
                        await delay(retryDelay)
                        wrapper(--n)
                    } else {
                        reject(err)
                    }
                })
        }

        wrapper(retries)
    })
}

retryFetch('http://localhost:8080/test', {}, 20)
    .then(res => res.text())
    .then(console.log)
    .catch(console.error)