The CSSOM view module lets you manipulate the visual view of a document, including getting the position of element layout boxes, obtaining the width or height of the viewport through script, and also scrolling an element.
For the JavaScript API defined by this module, see the CSSOM view API documentation.
The coordinate systems used to specify a position in a display context such as a window on a monitor, a viewport on a mobile device, or a position on a sheet of paper when printing.
The concept of the viewport — what it is, its impact in terms of CSS, SVG, and mobile devices — and the difference between the visual viewport and the layout viewport.
| Specification |
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| CSSOM View Module> |
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https://developer.mozilla.org/en-US/docs/Web/CSS/CSSOM_view