const img_default_size = 32;

var imgs = document.querySelectorAll('img')
var img_sizes = new Array();

for (let i = 0; i < imgs.length; i++) {
    img_sizes.push(img_default_size)
    imgs[i].addEventListener('click', resize)
}

function resize(event) {
    console.log(event.target);
    for (let i = 0; i < imgs.length; i++) {
        if (imgs[i] == event.target) {
            img_sizes[i] += 10
            if (img_sizes[i] >= 84) img_sizes[i] = img_default_size
            imgs[i].style.width = (img_sizes[i]).toString() + '%';
        }
    }
}