当页面加载时，图像加载的可见性值是否会设置为隐藏？

I am new to javascript. I would like to know how the loading works. Suppose in my html page I have an image whose visibility is set as hidden. I have an button which on click sets the visibility property of the image to visbile using javascript. When the page is loaded will the image load or will it load when the button is clicked.I am new to javascript. I would like to know ho