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@viewport.user-zoom

The user-zoom CSS descriptor controls whether or not the user can change the zoom factor of a document defined by @viewport.

/* Keyword values */
user-zoom: zoom;
user-zoom: fixed;

Related at-rule	`@viewport`
Initial value	`zoom`
Percentages	refer to the size of bounding box
Media	as each of the properties of the shorthand: `visual`: Value not found in DB! `continuous`: Value not found in DB!
Computed value	as specified
Canonical order	the unique non-ambiguous order defined by the formal grammar

zoom | fixed

Disabling zooming capabilities prevents people experiencing low vision conditions from being able to read and understand page content.

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

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	29	Yes Prefixed Yes Prefixed Prefixed Requires the vendor prefix: -ms-	No	10 Prefixed 10 Prefixed Prefixed Requires the vendor prefix: -ms-	?	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	?	29	Yes Prefixed Yes Prefixed Prefixed Requires the vendor prefix: -ms-	No	?	No	?

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https://developer.mozilla.org/en-US/docs/Web/CSS/@viewport/user-zoom