Struct CssSupportsRule 

pub struct CssSupportsRule { /* private fields */ }

The CssSupportsRule class.

MDN Documentation

This API requires the following crate features to be activated: CssSupportsRule

Methods from Deref<Target = CssConditionRule>

pub fn condition_text(&self) -> String

Getter for the conditionText field of this object.

MDN Documentation

This API requires the following crate features to be activated: CssConditionRule

pub fn set_condition_text(&self, value: &str)

Setter for the conditionText field of this object.

MDN Documentation

This API requires the following crate features to be activated: CssConditionRule

Methods from Deref<Target = CssGroupingRule>

pub fn css_rules(&self) -> CssRuleList

Getter for the cssRules field of this object.

MDN Documentation

This API requires the following crate features to be activated: CssGroupingRule, CssRuleList

pub fn delete_rule(&self, index: u32) -> Result<(), JsValue>

The deleteRule() method.

MDN Documentation

This API requires the following crate features to be activated: CssGroupingRule

pub fn insert_rule(&self, rule: &str) -> Result<u32, JsValue>

The insertRule() method.

MDN Documentation

This API requires the following crate features to be activated: CssGroupingRule

pub fn insert_rule_with_index( &self, rule: &str, index: u32, ) -> Result<u32, JsValue>

The insertRule() method.

MDN Documentation

This API requires the following crate features to be activated: CssGroupingRule

Methods from Deref<Target = CssRule>

pub fn type_(&self) -> u16

Getter for the type field of this object.

MDN Documentation

This API requires the following crate features to be activated: CssRule

pub fn css_text(&self) -> String

Getter for the cssText field of this object.

MDN Documentation

This API requires the following crate features to be activated: CssRule

pub fn set_css_text(&self, value: &str)

Setter for the cssText field of this object.

MDN Documentation

This API requires the following crate features to be activated: CssRule

pub fn parent_rule(&self) -> Option<CssRule>

Getter for the parentRule field of this object.

MDN Documentation

This API requires the following crate features to be activated: CssRule

pub fn parent_style_sheet(&self) -> Option<CssStyleSheet>

Getter for the parentStyleSheet field of this object.

MDN Documentation

This API requires the following crate features to be activated: CssRule, CssStyleSheet

pub const STYLE_RULE: u16 = 1u16

pub const CHARSET_RULE: u16 = 2u16

pub const IMPORT_RULE: u16 = 3u16

pub const MEDIA_RULE: u16 = 4u16

pub const FONT_FACE_RULE: u16 = 5u16

pub const PAGE_RULE: u16 = 6u16

pub const NAMESPACE_RULE: u16 = 10u16

pub const KEYFRAMES_RULE: u16 = 7u16

pub const KEYFRAME_RULE: u16 = 8u16

pub const COUNTER_STYLE_RULE: u16 = 11u16

pub const SUPPORTS_RULE: u16 = 12u16

pub const FONT_FEATURE_VALUES_RULE: u16 = 14u16

Methods from Deref<Target = Object>

pub fn constructor(&self) -> Function

The constructor property returns a reference to the Object constructor function that created the instance object.

MDN documentation

pub fn has_own_property(&self, property: &JsValue) -> bool

The hasOwnProperty() method returns a boolean indicating whether the object has the specified property as its own property (as opposed to inheriting it).

MDN documentation

pub fn is_prototype_of(&self, value: &JsValue) -> bool

The isPrototypeOf() method checks if an object exists in another object’s prototype chain.

MDN documentation

pub fn property_is_enumerable(&self, property: &JsValue) -> bool

The propertyIsEnumerable() method returns a Boolean indicating whether the specified property is enumerable.

MDN documentation

pub fn to_locale_string(&self) -> JsString

The toLocaleString() method returns a string representing the object. This method is meant to be overridden by derived objects for locale-specific purposes.

MDN documentation

pub fn to_string(&self) -> JsString

The toString() method returns a string representing the object.

MDN documentation

pub fn value_of(&self) -> Object

The valueOf() method returns the primitive value of the specified object.

MDN documentation

Methods from Deref<Target = JsValue>

pub const NULL: JsValue

pub const UNDEFINED: JsValue

pub const TRUE: JsValue

pub const FALSE: JsValue

pub fn as_f64(&self) -> Option<f64>

Returns the f64 value of this JS value if it’s an instance of a number.

If this JS value is not an instance of a number then this returns None.

pub fn is_string(&self) -> bool

Tests whether this JS value is a JS string.

pub fn as_string(&self) -> Option<String>

If this JS value is a string value, this function copies the JS string value into Wasm linear memory, encoded as UTF-8, and returns it as a Rust String.

To avoid the copying and re-encoding, consider the JsString::try_from() function from js-sys instead.

If this JS value is not an instance of a string or if it’s not valid utf-8 then this returns None.

UTF-16 vs UTF-8

JavaScript strings in general are encoded as UTF-16, but Rust strings are encoded as UTF-8. This can cause the Rust string to look a bit different than the JS string sometimes. For more details see the documentation about the str type which contains a few caveats about the encodings.

pub fn as_bool(&self) -> Option<bool>

Returns the bool value of this JS value if it’s an instance of a boolean.

If this JS value is not an instance of a boolean then this returns None.

pub fn is_null(&self) -> bool

Tests whether this JS value is null

pub fn is_undefined(&self) -> bool

Tests whether this JS value is undefined

pub fn is_null_or_undefined(&self) -> bool

Tests whether this JS value is null or undefined

pub fn is_symbol(&self) -> bool

Tests whether the type of this JS value is symbol

pub fn is_object(&self) -> bool

Tests whether typeof self == "object" && self !== null.

pub fn is_array(&self) -> bool

Tests whether this JS value is an instance of Array.

pub fn is_function(&self) -> bool

Tests whether the type of this JS value is function.

pub fn is_bigint(&self) -> bool

Tests whether the type of this JS value is bigint.

pub fn js_typeof(&self) -> JsValue

Applies the unary typeof JS operator on a JsValue.

MDN documentation

pub fn js_in(&self, obj: &JsValue) -> bool

Applies the binary in JS operator on the two JsValues.

MDN documentation

pub fn is_truthy(&self) -> bool

Tests whether the value is “truthy”.

pub fn is_falsy(&self) -> bool

Tests whether the value is “falsy”.

pub fn loose_eq(&self, other: &JsValue) -> bool

Compare two JsValues for equality, using the == operator in JS.

MDN documentation

pub fn bit_not(&self) -> JsValue

Applies the unary ~ JS operator on a JsValue.

MDN documentation

pub fn unsigned_shr(&self, rhs: &JsValue) -> u32

Applies the binary >>> JS operator on the two JsValues.

MDN documentation

pub fn checked_div(&self, rhs: &JsValue) -> JsValue

Applies the binary / JS operator on two JsValues, catching and returning any RangeError thrown.

MDN documentation

pub fn pow(&self, rhs: &JsValue) -> JsValue

Applies the binary ** JS operator on the two JsValues.

MDN documentation

pub fn lt(&self, other: &JsValue) -> bool

Applies the binary < JS operator on the two JsValues.

MDN documentation

pub fn le(&self, other: &JsValue) -> bool

Applies the binary <= JS operator on the two JsValues.

MDN documentation

pub fn ge(&self, other: &JsValue) -> bool

Applies the binary >= JS operator on the two JsValues.

MDN documentation

pub fn gt(&self, other: &JsValue) -> bool

Applies the binary > JS operator on the two JsValues.

MDN documentation

pub fn unchecked_into_f64(&self) -> f64

Applies the unary + JS operator on a JsValue. Can throw.

MDN documentation

Trait Implementations

impl AsRef<CssConditionRule> for CssSupportsRule

fn as_ref(&self) -> &CssConditionRule

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<CssGroupingRule> for CssSupportsRule

fn as_ref(&self) -> &CssGroupingRule

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<CssRule> for CssSupportsRule

fn as_ref(&self) -> &CssRule

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<CssSupportsRule> for CssSupportsRule

fn as_ref(&self) -> &CssSupportsRule

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<JsValue> for CssSupportsRule

fn as_ref(&self) -> &JsValue

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<Object> for CssSupportsRule

fn as_ref(&self) -> &Object

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for CssSupportsRule

fn clone(&self) -> CssSupportsRule

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CssSupportsRule

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

Formats the value using the given formatter.

impl Deref for CssSupportsRule

type Target = CssConditionRule

The resulting type after dereferencing.

fn deref(&self) -> &CssConditionRule

Dereferences the value.

impl From<CssSupportsRule> for CssConditionRule

fn from(obj: CssSupportsRule) -> CssConditionRule

Converts to this type from the input type.

impl From<CssSupportsRule> for CssGroupingRule

fn from(obj: CssSupportsRule) -> CssGroupingRule

Converts to this type from the input type.

impl From<CssSupportsRule> for CssRule

fn from(obj: CssSupportsRule) -> CssRule

Converts to this type from the input type.

impl From<CssSupportsRule> for JsValue

fn from(obj: CssSupportsRule) -> JsValue

Converts to this type from the input type.

impl From<CssSupportsRule> for Object

fn from(obj: CssSupportsRule) -> Object

Converts to this type from the input type.

impl From<JsValue> for CssSupportsRule

fn from(obj: JsValue) -> CssSupportsRule

Converts to this type from the input type.

impl FromWasmAbi for CssSupportsRule

type Abi = <JsValue as FromWasmAbi>::Abi

The Wasm ABI type that this converts from when coming back out from the ABI boundary.

unsafe fn from_abi(js: Self::Abi) -> Self

Recover a Self from Self::Abi.

impl<'a> IntoWasmAbi for &'a CssSupportsRule

type Abi = <&'a JsValue as IntoWasmAbi>::Abi

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl IntoWasmAbi for CssSupportsRule

type Abi = <JsValue as IntoWasmAbi>::Abi

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl JsCast for CssSupportsRule

fn instanceof(val: &JsValue) -> bool

Performs a dynamic instanceof check to see whether the JsValue provided is an instance of this type.

fn unchecked_from_js(val: JsValue) -> Self

Performs a zero-cost unchecked conversion from a JsValue into an instance of Self

fn unchecked_from_js_ref(val: &JsValue) -> &Self

Performs a zero-cost unchecked conversion from a &JsValue into an instance of &Self.

fn has_type<T>(&self) -> bool

where T: JsCast,

Test whether this JS value has a type T.

fn dyn_into<T>(self) -> Result<T, Self>

where T: JsCast,

Performs a dynamic cast (checked at runtime) of this value into the target type T.

fn dyn_ref<T>(&self) -> Option<&T>

where T: JsCast,

Performs a dynamic cast (checked at runtime) of this value into the target type T.

fn unchecked_into<T>(self) -> T

where T: JsCast,

Performs a zero-cost unchecked cast into the specified type.

fn unchecked_ref<T>(&self) -> &T

where T: JsCast,

Performs a zero-cost unchecked cast into a reference to the specified type.

fn is_instance_of<T>(&self) -> bool

where T: JsCast,

Test whether this JS value is an instance of the type T.

fn is_type_of(val: &JsValue) -> bool

Performs a dynamic check to see whether the JsValue provided is a value of this type.

impl LongRefFromWasmAbi for CssSupportsRule

type Abi = <JsValue as LongRefFromWasmAbi>::Abi

Same as RefFromWasmAbi::Abi

type Anchor = CssSupportsRule

Same as RefFromWasmAbi::Anchor

unsafe fn long_ref_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl OptionFromWasmAbi for CssSupportsRule

fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.

impl<'a> OptionIntoWasmAbi for &'a CssSupportsRule

fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option.

impl OptionIntoWasmAbi for CssSupportsRule

fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option.

impl PartialEq for CssSupportsRule

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefFromWasmAbi for CssSupportsRule

type Abi = <JsValue as RefFromWasmAbi>::Abi

The Wasm ABI type references to Self are recovered from.

type Anchor = ManuallyDrop<CssSupportsRule>

The type that holds the reference to Self for the duration of the invocation of the function that has an &Self parameter. This is required to ensure that the lifetimes don’t persist beyond one function call, and so that they remain anonymous.

unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor

Recover a Self::Anchor from Self::Abi.

impl WasmDescribe for CssSupportsRule

fn describe()

impl Eq for CssSupportsRule

impl StructuralPartialEq for CssSupportsRule