value-ref
Value reference with reactivity.
ref = v( init? )
Creates reactive mutable ref
object with .value
property holding internal value.
Exposes minimal Observable and AsyncIterable interfaces.
ref = v.from(...sources, map?)
Create reactive ref
object mapped from passed reactive sources / observables.
import v from './value-ref.js'
let count = v(0)
count.value // 0
const { unsubscribe } = count.subscribe(value => {
console.log(value)
return () => console.log('teardown', value)
})
count.value = 1
// > 1
count.value = 2
// > "teardown" 1
// > 2
unsubscribe()
// create mapped ref
let double = v.from(count, value => value * 2)
double.value // 4
count.value = 3
double.value // 6
// create from multiple refs
let sum = v.from(count.value, double.value, (count, double) => count + double)
// async iterable
for await (const value of sum) console.log(value)
// dispose refs (automatically unsubscribes on garbage collection)
count = double = sum = null
Note: manual dispose is available as ref[Symbol.dispose]
, but unnecessary - FinalizationRegistry unsubscribes automatically if reference is lost.
Related
- templize − template parts with reactive fields support.
- hyperf − dom fragments builder with reactive fields support.
- sube − subscribe to any reactive source.
- subscribable-things − collection of observables for different browser APIs - perfect match with spect.
Similar
observable-value, knockout/observable, mobx/observable, rxjs, vue3/ref, observable, observable proposal, observ, mutant, iron, icaro, introspected.
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