A birdcage (or bird cage) is a cage designed to house birds as pets. Antique (or antique-style) birdcages are often popular as collectors' items or as household decor but most are not suitable for housing live birds, being too small, or of unsafe materials or construction.ood quality cages designed for pet birds are more suitable. Most parrot cages are made or wrought iron and painted with a non-toxic paint referred to as powder-coating. However, the newest trend in the market is cages made of solid stainless steel.
A viewport is a 2D rectangle that defines the size of the rendering surface onto which a 3D scene is projected.
In this case the vmin unit would be the same as the vh unit. The viewport units are dynamic rather than static, so if you resize the browser window, the computed value of the units will also change. If for example your browser window is 1000px wide, and element with a width of 10vw would be 100px wide.