blob: 1e07f80ed7275269237ddf91097ff51b0cbb8b28 (
plain)
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
|
import { browser } from '$app/environment';
type PersistedValue<T> = {
get value(): T;
set value(newValue: T);
};
export function persisted<T>(key: string, initialValue: T): PersistedValue<T> {
let value = initialValue;
if (browser) {
try {
const stored = localStorage.getItem(key);
if (stored !== null) {
value = JSON.parse(stored) as T;
}
} catch (error) {
console.warn(`Failed to load ${key}:`, error);
}
}
const persist = (next: T) => {
if (!browser) {
return;
}
try {
if (next === null || next === undefined) {
localStorage.removeItem(key);
return;
}
localStorage.setItem(key, JSON.stringify(next));
} catch (error) {
console.warn(`Failed to persist ${key}:`, error);
}
};
return {
get value() {
return value;
},
set value(newValue: T) {
value = newValue;
persist(newValue);
}
};
}
|
