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Summary
The zoom CSS Descriptor sets the initial zoom factor of a document defined by @viewport.
A zoom factor of 1.0 or 100% corresponds to no zooming. Larger values zoom in. Smaller values zoom out.
| Related at-rule | @viewport |
|---|---|
| Initial value | auto |
| Percentages | the zoom factor itself |
| Media | visual, continuous |
| Computed value | auto, or a non-negative number or percentage as specified |
| Canonical order | the unique non-ambiguous order defined by the formal grammar |
Syntax
/* Keyword value */ zoom: auto; /* <number> values */ zoom: 0.8; zoom: 2.0; /* <percentage> values */ zoom: 150%;
Values
auto- The user agent will set the document's initial zoom factor. The user agent may use the size of the area of the canvas on which the document is rendered to find that factor.
<number>- A non-negative number used as zoom factor. A factor of 1.0 means that no zooming is done. Values larger than 1.0 result in a zoomed-in effect and values smaller than that in a zoomed-out effect.
<percentage>- A non-negative percentage value used as a zoom factor. A factor of 100% means that no zooming is done. Values larger than 100% result in a zoomed-in effect and values smaller than that in a zoomed-out effect.
Formal syntax
auto | <number> | <percentage>
Specifications
| Specification | Status | Comment |
|---|---|---|
| CSS Device Adaptation The definition of '"zoom" descriptor' in that specification. |
Working Draft | Initial specification |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | ? | ? | ? | ? | ? |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | ? | ? | ? | ? | ? | ? |