Files
dbgate/packages/web/src/utility/useStorage.js
2020-02-03 19:43:11 +01:00

37 lines
1.2 KiB
JavaScript

import React from 'react';
export default function useStorage(key, storageObject, initialValue) {
// State to store our value
// Pass initial state function to useState so logic is only executed once
const [storedValue, setStoredValue] = React.useState(() => {
try {
// Get from local storage by key
const item = storageObject.getItem(key);
// Parse stored json or if none return initialValue
return item ? JSON.parse(item) : initialValue;
} catch (error) {
// If error also return initialValue
console.log(error);
return initialValue;
}
});
// Return a wrapped version of useState's setter function that ...
// ... persists the new value to localStorage.
const setValue = value => {
try {
// Allow value to be a function so we have same API as useState
const valueToStore = value instanceof Function ? value(storedValue) : value;
// Save state
setStoredValue(valueToStore);
// Save to local storage
storageObject.setItem(key, JSON.stringify(valueToStore));
} catch (error) {
// A more advanced implementation would handle the error case
console.log(error);
}
};
return [storedValue, setValue];
}