mjm918

export const isReachable = async () =>{
    const timeout = new Promise((resolve, reject) => {
        setTimeout(reject, 5000, 'Request timed out');
    });
    const request = fetch('https://xxxxxx.com');
    try {
        const response = await Promise
            .race([timeout, request]);
        return true;
    }

babakness

import * as React from 'react'

const { useState, useEffect, useRef } = React

type IntervalFunction = () => ( unknown | void )

function useInterval( callback: IntervalFunction, delay: number ) {

  const savedCallback = useRef<IntervalFunction| null>( null )