Struct js_sys::Number

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

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Implementations

impl Number[−]

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

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

MDN documentation

impl Number[−]

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

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

MDN documentation

impl Number[−]

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

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().

MDN documentation

impl Number[−]

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

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

MDN documentation

impl Number[−]

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

👎 Deprecated:

recommended to use Number::from instead

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

MDN documentation

impl Number[−]

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

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

MDN documentation

impl Number[−]

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

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

MDN documentation

impl Number[−]

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

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

MDN documentation

impl Number[−]

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

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

MDN documentation

impl Number[−]

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

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

MDN documentation

impl Number[−]

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

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

MDN documentation

impl Number[−]

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

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

MDN documentation

impl Number[−]

pub fn value_of(&self) -> f64[−]

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

MDN documentation

impl Number[−]

pub const EPSILON: f64[−][−]

The smallest interval between two representable numbers.

MDN Documentation

pub const MAX_SAFE_INTEGER: f64[−][−]

The maximum safe integer in JavaScript (2^53 - 1).

MDN Documentation

pub const MAX_VALUE: f64[−][−]

The largest positive representable number.

MDN Documentation

pub const MIN_SAFE_INTEGER: f64[−][−]

The minimum safe integer in JavaScript (-(2^53 - 1)).

MDN Documentation

pub const MIN_VALUE: f64[−][−]

The smallest positive representable number—that is, the positive number closest to zero (without actually being zero).

MDN Documentation

pub const NAN: f64[−][−]

Special "Not a Number" value.

MDN Documentation

pub const NEGATIVE_INFINITY: f64[−][−]

Special value representing negative infinity. Returned on overflow.

MDN Documentation

pub const POSITIVE_INFINITY: f64[−][−]

Special value representing infinity. Returned on overflow.

MDN Documentation

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

Trait Implementations

impl AsRef<JsValue> for Number[+]

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fn as_ref(&self) -> &JsValue[−]

Performs the conversion.

impl AsRef<Number> for Number[+]

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fn as_ref(&self) -> &Number[−]

Performs the conversion.

impl AsRef<Object> for Number[+]

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fn as_ref(&self) -> &Object[−]

Performs the conversion.

impl Clone for Number[+]

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fn clone(&self) -> Number[−]

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl Debug for Number[+]

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

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[−]

Dereferences the value.

impl From<JsValue> for Number[+]

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fn from(obj: JsValue) -> Number[−]

Performs the conversion.

impl From<Number> for JsValue[+]

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fn from(obj: Number) -> JsValue[−]

Performs the conversion.

impl From<Number> for Object[+]

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fn from(obj: Number) -> Object[−]

Performs the conversion.

impl From<Number> for f64[+]

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fn from(n: Number) -> f64[−]

Performs the conversion.

impl From<f32> for Number[+]

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fn from(x: f32) -> Number[−]

Performs the conversion.

impl From<f64> for Number[+]

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fn from(x: f64) -> Number[−]

Performs the conversion.

impl From<i16> for Number[+]

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fn from(x: i16) -> Number[−]

Performs the conversion.

impl From<i32> for Number[+]

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fn from(x: i32) -> Number[−]

Performs the conversion.

impl From<i8> for Number[+]

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fn from(x: i8) -> Number[−]

Performs the conversion.

impl From<u16> for Number[+]

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fn from(x: u16) -> Number[−]

Performs the conversion.

impl From<u32> for Number[+]

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fn from(x: u32) -> Number[−]

Performs the conversion.

impl From<u8> for Number[+]

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fn from(x: u8) -> Number[−]

Performs the conversion.

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) -> Self[−]

Recover a Self from Self::Abi.

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) -> Self::Abi[−]

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) -> Self::Abi[−]

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

impl JsCast for Number[+]

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fn instanceof(val: &JsValue) -> bool[−]

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

fn is_type_of(val: &JsValue) -> bool[−]

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

impl OptionFromWasmAbi for Number[+]

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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 OptionIntoWasmAbi for Number[+]

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fn none() -> Self::Abi[−]

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[−]

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

impl PartialEq<f32> for Number[+]

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fn eq(&self, other: &f32) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

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#[must_use]fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl PartialEq<f64> for Number[+]

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fn eq(&self, other: &f64) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

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#[must_use]fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl PartialEq<i16> for Number[+]

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fn eq(&self, other: &i16) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

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#[must_use]fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl PartialEq<i32> for Number[+]

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fn eq(&self, other: &i32) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

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#[must_use]fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl PartialEq<i8> for Number[+]

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fn eq(&self, other: &i8) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

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#[must_use]fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl PartialEq<u16> for Number[+]

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fn eq(&self, other: &u16) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

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#[must_use]fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl PartialEq<u32> for Number[+]

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fn eq(&self, other: &u32) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

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#[must_use]fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl PartialEq<u8> for Number[+]

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fn eq(&self, other: &u8) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

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#[must_use]fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

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) -> Self::Anchor[−]

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

impl WasmDescribe for Number[+]

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fn describe()