In CSS, elements inside a flex container can indeed shrink in a specific order using the flex-shrink property in combination with the natural flow of the layout. However, there's no direct property like "shrink-order"

flex-shrink sets the relative rate at which an element shrinks when there's not enough space in the flex container. A higher value means the element shrinks faster or more compared to others.

also it will only work when the container has display:flex;