When i drag the right part of uploaded image in mask1 , than uploaded image in mask2 is dragging, but that should\'t happen....
Here is video link
You can use CSS clip-path property to cut off HTML element corners as you want. It's easy to get right value via tool, please google 'css clip-path maker'.
.masked-imga
-webkit-clip-path: polygon(0 9%, 0 0, 35% 0%, 49% 0, 56% 27%, 73% 46%, 100% 61%, 100% 100%, 65% 100%, 0 100%, 0 100%, 0 30%);
clip-path: polygon(0 9%, 0 0, 35% 0%, 49% 0, 56% 27%, 73% 46%, 100% 61%, 100% 100%, 65% 100%, 0 100%, 0 100%, 0 30%);
.masked-imgb
-webkit-clip-path: polygon(0 9%, 0 0, 35% 0%, 100% 0, 100% 0, 100% 0, 100% 61%, 100% 100%, 58% 100%, 40% 90%, 18% 63%, 0 39%);
clip-path: polygon(0 9%, 0 0, 35% 0%, 100% 0, 100% 0, 100% 0, 100% 61%, 100% 100%, 58% 100%, 40% 90%, 18% 63%, 0 39%);