Fast concept of failed promise detection

detect_failed_promise.js

function bulkRequest(urls) {
    const promises = urls.reduce((result, url) => {
	const isValidUrl = Object.prototype.toString.call(url) === '[object String]';
	    
        if (isValidUrl) {
            result.push(
                fetch(url)
                    .catch(({ message }) => console.warn(`Bulk Request: ${ message }`))
                    .then(response => ({ [url]: response }))
            )
        }

        return result
    }, [])

    return Promise.all(promises)
} 

const urls = ['https://reqres.in/api/unknown', 'https://reqres.in/api/users/23', 'http://httpstat.us/500'];
bulkRequest(urls).then(data => console.info('DATA:', data))