Struct Timer 

pub struct Timer {
    pub id: u64,
    pub delay: f64,
    pub seq: u64,
    pub callback: Value,
    pub args: Vec<Value>,
    pub cancelled: bool,
    pub interval: Option<f64>,
    pub refed: bool,
    pub deadline: Instant,
}

A scheduled macrotask (setTimeout/setInterval/setImmediate). Ordering is by (delay, seq) — a deterministic virtual clock, never wall time.

Fields

id: u64

delay: f64

seq: u64

callback: Value

args: Vec<Value>

cancelled: bool

interval: Option<f64>

Repeat period in ms for a setInterval timer; None for the one-shot setTimeout/setImmediate. A repeating timer is re-armed with a fresh deadline each time it fires, so it keeps the loop alive indefinitely — exactly like Node, where setInterval runs until cleared.

refed: bool

Node’s ref/unref handle bit. Only a referenced pending timer keeps the event loop alive; an unref’d one still fires while the loop happens to be alive for another reason, but never holds it open by itself.

deadline: Instant

Real wall-clock deadline (now + delay), used only on the real-clock path (an open handle or a pending interval). On the pure virtual clock this is ignored.