Struct js_sys::Number

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#[repr(transparent)]
pub struct Number { /* fields omitted */ }

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Methods

impl Number

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pub fn is_finite(value: &JsValue) -> bool

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The Number.isFinite() method determines whether the passed value is a finite number.

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impl Number

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pub fn is_integer(value: &JsValue) -> bool

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The Number.isInteger() method determines whether the passed value is an integer.

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impl Number

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pub fn is_nan(value: &JsValue) -> bool

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The Number.isNaN() method determines whether the passed value is NaN and its type is Number. It is a more robust version of the original, global isNaN().

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impl Number

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pub fn is_safe_integer(value: &JsValue) -> bool

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The Number.isSafeInteger() method determines whether the provided value is a number that is a safe integer.

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impl Number

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pub fn new(value: &JsValue) -> Number

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The Number JavaScript object is a wrapper object allowing you to work with numerical values. A Number object is created using the Number() constructor.

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impl Number

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pub fn parse_int(text: &str, radix: u8) -> f64

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The Number.parseInt() method parses a string argument and returns an integer of the specified radix or base.

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impl Number

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pub fn parse_float(text: &str) -> f64

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The Number.parseFloat() method parses a string argument and returns a floating point number.

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impl Number

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pub fn to_locale_string(&self, locale: &str) -> JsString

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The toLocaleString() method returns a string with a language sensitive representation of this number.

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impl Number

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pub fn to_precision(&self, precision: u8) -> Result<JsString, JsValue>

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The toPrecision() method returns a string representing the Number object to the specified precision.

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impl Number

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pub fn to_fixed(&self, digits: u8) -> Result<JsString, JsValue>

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The toFixed() method returns a string representing the Number object using fixed-point notation.

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impl Number

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pub fn to_exponential(&self, fraction_digits: u8) -> Result<JsString, JsValue>

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The toExponential() method returns a string representing the Number object in exponential notation.

MDN documentation

impl Number

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pub fn to_string(&self, radix: u8) -> Result<JsString, JsValue>

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

MDN documentation

impl Number

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pub fn value_of(&self) -> f64

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The valueOf() method returns the wrapped primitive value of a Number object.

MDN documentation

Methods from Deref<Target = Object>

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

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

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

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

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

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

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pub fn to_locale_string(&self) -> JsString

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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

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

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pub fn value_of(&self) -> Object

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

MDN documentation

Trait Implementations

impl AsRef<JsValue> for Number

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fn as_ref(&self) -> &JsValue

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Performs the conversion.

impl AsRef<Object> for Number

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fn as_ref(&self) -> &Object

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Performs the conversion.

impl From<JsValue> for Number

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fn from(obj: JsValue) -> Number

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Performs the conversion.

impl From<Number> for JsValue

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fn from(obj: Number) -> JsValue

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Performs the conversion.

impl From<Number> for Object

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fn from(obj: Number) -> Object

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Performs the conversion.

impl Clone for Number

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fn clone(&self) -> Number

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl Debug for Number

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

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Formats the value using the given formatter.

impl Deref for Number

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type Target = Object

The resulting type after dereferencing.

fn deref(&self) -> &Object

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Dereferences the value.

impl WasmDescribe for Number

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fn describe()

impl IntoWasmAbi for Number

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type Abi = <JsValue as IntoWasmAbi>::Abi

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

fn into_abi(self, extra: &mut dyn Stack) -> Self::Abi

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

impl<'a> IntoWasmAbi for &'a Number

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

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

fn into_abi(self, extra: &mut dyn Stack) -> Self::Abi

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

impl FromWasmAbi for Number

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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, extra: &mut dyn Stack) -> Self

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Recover a Self from Self::Abi.

impl OptionFromWasmAbi for Number

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

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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 RefFromWasmAbi for Number

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type Abi = <JsValue as RefFromWasmAbi>::Abi

The wasm ABI type references to Self are recovered from.

type Anchor = ManuallyDrop<Number>

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, extra: &mut dyn Stack) -> Self::Anchor

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

impl OptionIntoWasmAbi for Number

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fn none() -> Self::Abi

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

impl<'a> OptionIntoWasmAbi for &'a Number

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fn none() -> Self::Abi

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

impl JsCast for Number

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fn instanceof(val: &JsValue) -> bool

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

fn unchecked_from_js(val: JsValue) -> Self

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

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

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

fn is_instance_of<T>(&self) -> bool where     T: JsCast,

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

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

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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,

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

fn unchecked_into<T>(self) -> T where     T: JsCast,

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

fn unchecked_ref<T>(&self) -> &T where     T: JsCast,

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