1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*
This file is part of GNU Taler
(C) 2021 Taler Systems S.A.
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
*
* @author Sebastian Javier Marchano (sebasjm)
*/
import { StateUpdater, useState } from "preact/hooks";
export function useLocalStorage(key: string, initialValue?: string): [string | undefined, StateUpdater<string | undefined>] {
const [storedValue, setStoredValue] = useState<string | undefined>((): string | undefined => {
return typeof window !== "undefined" ? window.localStorage.getItem(key) || initialValue : initialValue;
});
const setValue = (value?: string | ((val?: string) => string | undefined)) => {
setStoredValue(p => {
const toStore = value instanceof Function ? value(p) : value
if (typeof window !== "undefined") {
if (!toStore) {
window.localStorage.removeItem(key)
} else {
window.localStorage.setItem(key, toStore);
}
}
return toStore
})
};
return [storedValue, setValue];
}
//TODO: merge with the above function
export function useNotNullLocalStorage(key: string, initialValue: string): [string, StateUpdater<string>] {
const [storedValue, setStoredValue] = useState<string>((): string => {
return typeof window !== "undefined" ? window.localStorage.getItem(key) || initialValue : initialValue;
});
const setValue = (value: string | ((val: string) => string)) => {
const valueToStore = value instanceof Function ? value(storedValue) : value;
setStoredValue(valueToStore);
if (typeof window !== "undefined") {
if (!valueToStore) {
window.localStorage.removeItem(key)
} else {
window.localStorage.setItem(key, valueToStore);
}
}
};
return [storedValue, setValue];
}
|
