Virtual viewport

A wider imaginary screen a phone uses for pages not built for phones.

By Mackenzie Bowes · mackenzie@mackenziebowes.com · @_mackenziebowes on X

Source

“if a mobile screen has a width of 640px, pages might be rendered with a virtual viewport of 980px, and then it will be shrunk down to fit into the 640px space.” Viewport (MDN Web Docs)

See also: Viewport.