Created
July 23, 2024 12:54
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A couple "intelligent" references (set and map) for VueJS 3
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| import { customRef } from "vue"; | |
| export const isDifferentSet = <T>(newSet: Set<T>, oldSet: Set<T>): boolean => { | |
| if (newSet.size !== oldSet.size) { | |
| return true; | |
| } | |
| for (const value of newSet) { | |
| if (!oldSet.has(value)) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| }; | |
| export const isDifferentMap = <K, V>(newMap: Map<K, V>, oldMap: Map<K, V>): boolean => { | |
| if (newMap.size !== oldMap.size) { | |
| return true; | |
| } | |
| for (const [key, value] of newMap) { | |
| if (oldMap.get(key) !== value) { | |
| return true; | |
| } | |
| } | |
| return false; | |
| }; | |
| export const useIntelligentSetRef = <T>(initial: Set<T>) => { | |
| return customRef((track, trigger) => { | |
| let set = initial; | |
| return { | |
| get() { | |
| track(); | |
| return set; | |
| }, | |
| set(newSet: Set<T>) { | |
| if (isDifferentSet(newSet, set)) { | |
| set = newSet; | |
| trigger(); | |
| } | |
| }, | |
| }; | |
| }); | |
| }; | |
| export const useIntelligentMapRef = <K, V>(initial: Map<K, V>) => { | |
| return customRef((track, trigger) => { | |
| let map = initial; | |
| return { | |
| get() { | |
| track(); | |
| return map; | |
| }, | |
| set(newMap: Map<K, V>) { | |
| if (isDifferentMap(newMap, map)) { | |
| map = newMap; | |
| trigger(); | |
| } | |
| }, | |
| }; | |
| }); | |
| }; |
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