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.
LearnThinking Ahead: CSS Device Adaptation With @viewport. When we need to adjust a deviceâs browser viewport, the HTML <meta name=viewport> tag is usually our go-to solution. But the viewport meta tag is surprisingly ânon-normativeâââitâs not a formal W3C spec, much less a web standard.