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[FIX]: #1529 Watch Local Storage Changes #1652

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Merged
merged 1 commit into from
Apr 24, 2025
Merged

[FIX]: #1529 Watch Local Storage Changes #1652

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43 changes: 29 additions & 14 deletions client/packages/lowcoder/src/comps/hooks/localStorageComp.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -13,21 +13,28 @@ const APP_STORE_NAMESPACE = "lowcoder_app_local_storage";
const LocalStorageCompBase = withViewFn(
simpleMultiComp({ values: stateComp<JSONObject>({}) }),
(comp) => {
const originStore = localStorage.getItem(APP_STORE_NAMESPACE) || "{}";
let parseStore = {};
try {
parseStore = JSON.parse(originStore);
} catch (e) {
log.error("application local storage invalid");
}

// add custom event listener to update values reactively
useEffect(() => {
const value = comp.children.values.value;
if (!isEqual(value, parseStore)) {
log.info(value, parseStore);
comp.children.values.dispatchChangeValueAction(parseStore);
}
}, [parseStore]);
const handler = () => {
try {
const raw = localStorage.getItem(APP_STORE_NAMESPACE) || "{}";
const parsed = JSON.parse(raw);
comp.children.values.dispatchChangeValueAction(parsed);
} catch (e) {
log.error("Failed to parse localStorage:", e);
}
};

// Add listener on mount
window.addEventListener("lowcoder-localstorage-updated", handler);

// Run once on mount to initialize
handler();

return () => {
window.removeEventListener("lowcoder-localstorage-updated", handler);
};
}, []);

return null;
}
Expand Down Expand Up @@ -62,6 +69,8 @@ LocalStorageComp = withMethodExposing(LocalStorageComp, [
parseStore[key] = value;
localStorage.setItem(APP_STORE_NAMESPACE, JSON.stringify(parseStore));
comp.children.values.dispatchChangeValueAction(parseStore);

window.dispatchEvent(new CustomEvent("lowcoder-localstorage-updated"));
} catch (e) {
localStorage.setItem(APP_STORE_NAMESPACE, "{}");
}
Expand All @@ -83,6 +92,9 @@ LocalStorageComp = withMethodExposing(LocalStorageComp, [
delete parseStore[key];
localStorage.setItem(APP_STORE_NAMESPACE, JSON.stringify(parseStore));
comp.children.values.dispatchChangeValueAction(parseStore);

// Trigger update
window.dispatchEvent(new CustomEvent("lowcoder-localstorage-updated"));
} catch (e) {
localStorage.setItem(APP_STORE_NAMESPACE, "{}");
}
Expand All @@ -98,6 +110,9 @@ LocalStorageComp = withMethodExposing(LocalStorageComp, [
execute: (comp) => {
localStorage.removeItem(APP_STORE_NAMESPACE);
comp.children.values.dispatchChangeValueAction({});

// Trigger update
window.dispatchEvent(new CustomEvent("lowcoder-localstorage-updated"));
},
},
]);
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