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.
viewport width, and vmin represents whichever of vh or vw is the shortest length. The values used can be somewhat confusing if youâve not used these units before, as 1vh represents 1% of the current viewport (the content area of the browser window) height, rather than 100% as you may expect. Therefore if you want an element to be the full height of your viewport you should set it to 100vh. As you would expect, vw works exactly the same way as vh units. If you have a widescreen monitor and your browser window is set to full screen, the width would be wider than the height.