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42 lines
1.2 KiB
42 lines
1.2 KiB
import { effect, release } from './reactivity'
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export function entangle({ get: outerGet, set: outerSet }, { get: innerGet, set: innerSet }) {
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let firstRun = true
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let outerHash
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let innerHash
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let reference = effect(() => {
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let outer = outerGet()
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let inner = innerGet()
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if (firstRun) {
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innerSet(cloneIfObject(outer))
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firstRun = false
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} else {
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let outerHashLatest = JSON.stringify(outer)
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let innerHashLatest = JSON.stringify(inner)
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if (outerHashLatest !== outerHash) { // If outer changed...
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innerSet(cloneIfObject(outer))
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} else if (outerHashLatest !== innerHashLatest) { // If inner changed...
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outerSet(cloneIfObject(inner))
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} else { // If nothing changed...
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// Prevent an infinite loop...
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}
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}
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outerHash = JSON.stringify(outerGet())
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innerHash = JSON.stringify(innerGet())
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})
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return () => {
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release(reference)
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}
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}
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function cloneIfObject(value) {
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return typeof value === 'object'
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? JSON.parse(JSON.stringify(value))
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: value
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}
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