Toasts are as flexible as you need and have very little required markup. At a minimum, we require a single element to contain your “toasted” content and strongly encourage a dismiss button.
Toasts are slightly translucent, too, so they blend over whatever they might appear over. For browsers that support the backdrop-filter CSS property, we’ll also attempt to blur the elements under a toast.
When you have multiple toasts, it will vertically stack them in a readable manner.