Struct JsInstant 

#[repr(C)]
pub struct JsInstant {
    pub ms: js_number,
}

Available on crate feature js only.

⬡ 🕘 A high-resolution timestamp based on JavaScript’s performance.now().

---

^{📍 lang/prog/ffi/js}

^{📦 size_of::<JsInstant>() == 8 bytes / 64 bits}

---

The internal representation is a double-precision floating-point millisecond value.

Fields

ms: js_number

Milliseconds since performance.timeOrigin.

Implementations

impl JsInstant

pub const fn as_millis_f64(self) -> js_number

Returns the time in milliseconds.

pub const fn from_millis_f64(millis: js_number) -> Self

Returns a new JsInstant from a timestamp in milliseconds.

pub const fn as_secs_f64(self) -> js_number

Returns the time in f64 seconds.

pub const fn from_secs_f64(secs: js_number) -> Self

Returns a new JsInstant from a timestamp in milliseconds.

pub const fn since(self, earlier: Self) -> Self

Returns the duration between this and an earlier JsInstant.

pub const fn delta_since(self, earlier: Self) -> TimeDelta

Returns the duration between this and an earlier instant as a TimeDelta.

impl JsInstant

pub fn now() -> Self

Available on crate feature web only.

Returns the current instant using performance.now().

pub fn origin() -> Self

Available on crate feature web only.

Returns the time origin using performance.timeOrigin().

pub fn reset(&mut self)

Available on crate feature web only.

Resets this instant to the current time.

pub fn elapsed(self) -> Self

Available on crate feature web only.

Returns the elapsed time since this instant.

pub fn delta_elapsed(self) -> TimeDelta

Available on crate feature web only.

Returns the elapsed time since this instant as a TimeDelta.

Trait Implementations

impl Clone for JsInstant

fn clone(&self) -> JsInstant

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for JsInstant

impl Debug for JsInstant

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

Formats the value using the given formatter.

impl Display for JsInstant

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

Formats the value using the given formatter.

impl From<EventTimestamp> for JsInstant

fn from(from: EventTimestamp) -> Self

Converts to this type from the input type.

impl From<JsInstant> for EventTimestamp

fn from(from: JsInstant) -> Self

Converts to this type from the input type.

impl PartialEq for JsInstant

fn eq(&self, other: &JsInstant) -> 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 StructuralPartialEq for JsInstant

impl TimeSource<u32> for JsInstant

Available on crate feature web and non-Windows only.

Relative u32 projection of JsInstant in milliseconds.

This compact projection favors storage size while keeping a practical range for browser sessions and medium-lived applications.

At millisecond resolution, u32 spans about 49.7 days.

fn time_is_monotonic() -> bool

Returns whether this source is monotonic.

fn time_is_absolute() -> bool

Returns whether this source provides an absolute civil timeline.

fn time_scale() -> TimeScale

Returns the unit used by time_point_value and time_elapsed_value.

fn time_now() -> u32

Returns the current time point in the chosen representation P.

fn time_point_value(point: u32) -> u64

Converts a time point into a u64 value in time_scale units.

fn time_elapsed_value(elapsed: u32) -> u64

Converts an elapsed value into a u64 value in time_scale units.

fn time_now_millis_f64() -> f64

Returns the current timestamp as milliseconds in f64.

fn time_now_value() -> u64

Returns the current time as a u64 value in time_scale units.

fn time_elapsed_since(point: P) -> P::Elapsed

Returns the forward elapsed value from point to now.

fn time_elapsed_since_checked(point: P) -> Option<P::Elapsed>

Returns the forward elapsed value from point to now, or None if it is not valid or not representable.

fn time_elapsed_since_value(point: P) -> u64

Returns the forward elapsed value from point to now as a u64 in time_scale units.

fn time_point_seconds(point: P) -> u64

Converts point to seconds.

fn time_point_millis(point: P) -> u64

Converts point to milliseconds.

fn time_point_micros(point: P) -> u64

Converts point to microseconds.

fn time_point_nanos(point: P) -> u64

Converts point to nanoseconds.

fn time_elapsed_seconds(elapsed: P::Elapsed) -> u64

Converts elapsed to seconds.

fn time_elapsed_millis(elapsed: P::Elapsed) -> u64

Converts elapsed to milliseconds.

fn time_elapsed_micros(elapsed: P::Elapsed) -> u64

Converts elapsed to microseconds.

fn time_elapsed_nanos(elapsed: P::Elapsed) -> u64

Converts elapsed to nanoseconds.

fn time_now_seconds() -> u64

Returns the current timestamp in seconds.

fn time_now_millis() -> u64

Returns the current timestamp in milliseconds.

fn time_now_micros() -> u64

Returns the current timestamp in microseconds.

fn time_now_nanos() -> u64

Returns the current timestamp in nanoseconds.

impl TimeSource<u64> for JsInstant

Available on crate feature web and non-Windows only.

Relative u64 projection of JsInstant in milliseconds.

This is the canonical wide numeric projection for the browser high-resolution time origin. Milliseconds are the native scale exposed by the type’s public API.

At millisecond resolution, u64 spans about 584 million years.

fn time_is_monotonic() -> bool

Returns whether this source is monotonic.

fn time_is_absolute() -> bool

Returns whether this source provides an absolute civil timeline.

fn time_scale() -> TimeScale

Returns the unit used by time_point_value and time_elapsed_value.

fn time_now() -> u64

Returns the current time point in the chosen representation P.

fn time_point_value(point: u64) -> u64

Converts a time point into a u64 value in time_scale units.

fn time_elapsed_value(elapsed: u64) -> u64

Converts an elapsed value into a u64 value in time_scale units.

fn time_now_millis_f64() -> f64

Returns the current timestamp as milliseconds in f64.

fn time_now_value() -> u64

Returns the current time as a u64 value in time_scale units.

fn time_elapsed_since(point: P) -> P::Elapsed

Returns the forward elapsed value from point to now.

fn time_elapsed_since_checked(point: P) -> Option<P::Elapsed>

Returns the forward elapsed value from point to now, or None if it is not valid or not representable.

fn time_elapsed_since_value(point: P) -> u64

Returns the forward elapsed value from point to now as a u64 in time_scale units.

fn time_point_seconds(point: P) -> u64

Converts point to seconds.

fn time_point_millis(point: P) -> u64

Converts point to milliseconds.

fn time_point_micros(point: P) -> u64

Converts point to microseconds.

fn time_point_nanos(point: P) -> u64

Converts point to nanoseconds.

fn time_elapsed_seconds(elapsed: P::Elapsed) -> u64

Converts elapsed to seconds.

fn time_elapsed_millis(elapsed: P::Elapsed) -> u64

Converts elapsed to milliseconds.

fn time_elapsed_micros(elapsed: P::Elapsed) -> u64

Converts elapsed to microseconds.

fn time_elapsed_nanos(elapsed: P::Elapsed) -> u64

Converts elapsed to nanoseconds.

fn time_now_seconds() -> u64

Returns the current timestamp in seconds.

fn time_now_millis() -> u64

Returns the current timestamp in milliseconds.

fn time_now_micros() -> u64

Returns the current timestamp in microseconds.

fn time_now_nanos() -> u64

Returns the current timestamp in nanoseconds.