Forked from giuseppeg/pspdfkit-indexeddb-cache-sample.js
Created
December 19, 2022 10:13
-
-
Save markusbkk/040e5edab505cd167212f26f549210d6 to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| function getCache(name) { | |
| return new Promise((resolve, reject) => { | |
| const version = 1; | |
| const request = indexedDB.open(name, version); | |
| request.onsuccess = event => { | |
| const db = event.target.result; | |
| /* | |
| * Returns a Promise that resolves with an object | |
| * which contains { put, get } helpers. | |
| */ | |
| resolve({ | |
| put: (key, value) => | |
| new Promise((resolve, reject) => { | |
| try { | |
| const result = db | |
| .transaction([name], "readwrite") | |
| .objectStore(name) | |
| .put(value, key); | |
| result.onsuccess = resolve; | |
| result.onerror = reject; | |
| } catch (e) { | |
| reject(e); | |
| } | |
| }), | |
| /* | |
| * Returns a Promise that resolves with the `value` for `key`. | |
| */ | |
| get: key => | |
| new Promise((resolve, reject) => { | |
| try { | |
| const result = db | |
| .transaction([name]) | |
| .objectStore(name) | |
| .get(key); | |
| result.onsuccess = event => { | |
| resolve(event.target.result); | |
| }; | |
| result.onerror = reject; | |
| } catch (e) { | |
| reject(e); | |
| } | |
| }) | |
| }); | |
| }; | |
| // This will open/create the database. | |
| request.onupgradeneeded = event => { | |
| const db = event.target.result; | |
| db.createObjectStore(name); | |
| }; | |
| request.onerror = reject; | |
| }); | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment