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@viewport.zoom

The zoom CSS descriptor sets the initial zoom factor of a document defined by the @viewport at-rule.

A zoom factor of 1.0 or 100% corresponds to no zooming. Larger values are zoomed in. Smaller values are zoomed out.

/* Keyword value */
zoom: auto;

/* <number> values */
zoom: 0.8;
zoom: 2.0;

/* <percentage> values */
zoom: 150%;

auto: The user agent will set the document's initial zoom factor. The user agent may use the size of canvas area on which the document is rendered to determine that factor.
<number>: A non-negative number used as the zoom factor.
<percentage>: A non-negative percentage value used as the zoom factor.

Related at-rule	`@viewport`
Initial value	`auto`
Percentages	the zoom factor itself
Computed value	`auto`, or a non-negative number or percentage as specified

auto | <number> | <percentage>

@viewport {
  zoom: 2.0;
}

Specification	Status	Comment
CSS Device Adaptation The definition of '"zoom" descriptor' in that specification.	Working Draft	Initial specification

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
`zoom` descriptor	29 — 84	12 Prefixed 12 Prefixed Prefixed Implemented with the vendor prefix: -ms-	No	10 Prefixed 10 Prefixed Prefixed Implemented with the vendor prefix: -ms-	16	No

	Mobile
	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`zoom` descriptor	4.4 — 37	61 — 84	No	16	No	8.0