This hook can be used to handle any component state with all JSON compatible values.
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import { useEffect, useRef, useState } from "react";
/**
* Handle component state using local storage
*
* @param key The name of the key. If the passed key is updated, the local storage item with the old key will be removed.
* @param defaultValue The initial value to be used if no local storage item is found.
* Values that are not JSON compatible such as undefined, Function and Symbol, cannot be used.
* If any of these values are found during conversion, they will be omitted (when found in an object)
* Or changed to null (when found in an array)
* @param [overWrite = false] Use the default value to overwrite a pre-existing local storage value.
* @return Returns two values: the current value stored in local storage and a function to set/update value in the local storage.
*/
export const useLocalStorage = <T,>(
key: string,
defaultValue: T,
overWrite = false
) => {
const [value, setValue] = useState<T>(() => {
if (typeof window === "undefined")
throw new Error("localStorage can be used only in client side");
if (overWrite) return defaultValue;
else {
try {
const currentValue = window.localStorage.getItem(key);
if (currentValue) return JSON.parse(currentValue) as T;
} catch (error) {
console.error(
`Error while reading localStorage item with key=${key}:`,
error
);
return defaultValue;
}
return defaultValue;
}
});
const previousKeyRef = useRef<string>("");
useEffect(() => {
const previousKey = previousKeyRef.current;
if (previousKey !== key && previousKey) {
try {
window.localStorage.removeItem(previousKey);
} catch (error) {
console.error(
`Error while removing localStorage item with key=${previousKey}:`,
error
);
}
}
previousKeyRef.current = key;
try {
window.localStorage.setItem(key, JSON.stringify(value));
} catch (error) {
console.error(
`Error while setting localStorage item with key=${key}:`,
error
);
}
}, [value, key, defaultValue]);
return [value, setValue] as const;
};
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