Check if a URL is valid image in JavaScript

index.js

/*
 * Check if a URL is valid image in JavaScript
 *
 * Usage: pass the url to isValid(), if it's a valid image url,
 * the function will return URL and if not, you'll get false or
 * whatever you've entered in second parameter
 *
 * Developer: Amirhosseinhpv ( https://hpv.im/ )
 * Snippet at: 1399-05-06 2020-07-27 19:11
 */

let isValid = function(urlTocheck="", defaultValue=false){
    var image = new Image();
    image.src = urlTocheck;
    if (image.width == 0) {
       return defaultValue;
    } else {
       return urlTocheck;
    }
 }