javascript - Tracker.autorun() not running on every update of a ReactiveVar -

i have meteor reactivevar, used update trigger in data store. tracker not run every time reactive var set.

it seems when state set in quick succession, tracker doesn't run.

this code store:

const mystore = {     states = {         ...     },      updatetrigger = new reactivevar({ name: null, timestamp: null }),      setstate({ name, value }) {         this.states[name] = value;         console.log('set state', name);         this.updatetrigger.set({ name, timestamp: new date().gettime() });     }, }; 

and tracker:

tracker.autorun(() => {     const updatetrigger = mystore.updatetrigger.get();     console.log('tracker', updatetrigger.name);     if (updatetrigger.name === state-two) myfunction(); }); 

the console logs this:

'set state state-one' // update state-one 'tracker state-one' 'set state state-two' // update state-two 'set state state-one' // update state-one 'tracker state-one' 'set state state-three' // update state-three 'tracker state-three' 'set state state-one' // update state-one 'set state state-two' // update state-two 'set state state-three' // update state-three 'tracker state-three' 

i can't see why happening.

it seems race condition it's indiscriminate updates logs , ones doesn't.

the states updated quite (state 1 once every 1.5s, , others every second or so).

any suggestions going wrong, or other approaches welcome.

i use pubsub package. i'm not big fan of tracker , reactivevar, i'm not sure what's best practice here, , don't want use tracker+reactivevar in places, , pubsub in others.

having each individual state reactivevar not option, need persist state database on update.

this due tracker's flush cycle.

from tracker manual:

... default, all changes reactive values batched , put effect @ once, when javascript code has finished executing , system idle. ... process ... called flushing, , it's possible manually trigger it calling tracker.flush().

therefore, adding explicit flush in code yield desired effect:

const mystore = {     states = {         ...     },      updatetrigger = new reactivevar({ name: null, timestamp: null }),      setstate({ name, value }) {         this.states[name] = value;         console.log('set state', name);         this.updatetrigger.set({ name, timestamp: new date().gettime() });         tracker.flush(); // added     }, };