Browsers on mobile devices support two kinds of viewports: a layout viewport containing the Web page content that appears on the screen,and a visual viewport containing the complete content of the page,some of which is hidden from the user.

Question

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The visual viewport is the part of the webpage that is visible to the user, while the layout viewport contains the complete content of the page, including the parts that are not currently visible.

Browsers on Mobile Devices Support Two Kinds of Viewports: a Layout