Check if a image file exists with Javascript

checkImageExist.js

/**
* Checking if an image exist in your image folder
*/
  let loadImage = function(variable){
    var image = new Image();
    var url_image = './ImageFolder/' + variable + '.jpg';
    image.src = url_image;
    if (image.width == 0) {
       return `<img src='./ImageFolder/defaultImage.jpg'>`;
    } else {
       return `<img src='./ImageFolder/`+variable+`.jpg'`;
    }
 }