Enum Platform 

pub enum Platform {
    IosPhone,
    IosTablet,
    IosWatch,
    AndroidPhone,
    AndroidTablet,
    Macos,
    Tv,
    Web,
}

What kind of device is being emulated.

Why this exists

Setting the viewport is not device emulation. A page served to a desktop User-Agent can declare <meta name="viewport" content="width=1120">, and Chrome honours that meta tag whenever mobile is set — so the layout viewport becomes 1120 CSS px and the desktop layout is merely scaled down into a phone-sized frame. The image is the right number of pixels and shows entirely the wrong thing.

Measured against a real site with identical metrics, changing only the User-Agent and touch points:

	metrics only	+ UA + touch
innerWidth	1120	440
maxTouchPoints	0	5
meta viewport	width=1120	width=device-width

The server returned different HTML. Emulating the platform is therefore part of producing a correct screenshot, not a nicety.

Variants

IosPhone

IosTablet

IosWatch

AndroidPhone

AndroidTablet

Macos

Tv

Web

Implementations

impl Platform

pub fn user_agent(self) -> Option<&'static str>

A representative User-Agent for this platform.

These are deliberately generic-but-plausible rather than pinned to one handset: the goal is for content negotiation to pick the right layout, not to impersonate a specific device.

pub fn ch_platform(self) -> &'static str

Platform name for User-Agent Client Hints (Sec-CH-UA-Platform).

Modern sites increasingly branch on Client Hints rather than the UA string, so overriding one without the other produces a page that is half-convinced it is on a phone.

pub fn ch_mobile(self) -> bool

Whether Client Hints should report a mobile device.

pub fn touch_points(self) -> u32

Simultaneous touch points to report, or 0 for a pointer device.

Trait Implementations

impl Clone for Platform

fn clone(&self) -> Platform

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Platform

impl Debug for Platform

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Platform

fn default() -> Platform

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Platform

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Platform

impl PartialEq for Platform

fn eq(&self, other: &Platform) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for Platform

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Platform