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https://github.com/fregante/webext-storage-cache
Cache values in your Web Extension and clear them on expiration. Also includes a memoize-like API to cache any function results automatically
https://github.com/fregante/webext-storage-cache
Last synced: about 1 month ago
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Cache values in your Web Extension and clear them on expiration. Also includes a memoize-like API to cache any function results automatically
- Host: GitHub
- URL: https://github.com/fregante/webext-storage-cache
- Owner: fregante
- License: mit
- Created: 2019-06-07T07:35:37.000Z (over 5 years ago)
- Default Branch: main
- Last Pushed: 2023-12-22T15:38:21.000Z (12 months ago)
- Last Synced: 2024-05-01T21:17:30.379Z (8 months ago)
- Language: JavaScript
- Homepage: https://npm.im/webext-storage-cache
- Size: 179 KB
- Stars: 79
- Watchers: 4
- Forks: 4
- Open Issues: 4
-
Metadata Files:
- Readme: readme.md
- License: license
Awesome Lists containing this project
- Awesome-WebExtensions - webext-storage-cache - Map-like promised cache storage with expiration. (Libraries and Frameworks)
README
# webext-storage-cache [](https://www.npmjs.com/package/webext-storage-cache)
> Cache values in your Web Extension and clear them on expiration. Also includes a memoize-like API to cache any function results automatically.
- Browsers: Chrome, Firefox, and Safari
- Manifest: v2 and v3
- Context: They can be called from any context that has access to the `chrome.storage` APIs
- Permissions: (with attached "reasons" for submission to the Chrome Web Store)
- `storage`: "The extension caches some values into the local storage"
- `alarms`: "The extension automatically clears its expired storage at certain intervals"
## Install
You can download the [standalone bundle](https://bundle.fregante.com/?pkg=webext-storage-cache&global=window) and include it in your `manifest.json`.
Or use `npm`:
```sh
npm install webext-storage-cache
```
## Usage
This module requires the `storage` permission and it’s suggested to also use `alarms` to safely schedule cache purging:
```json5
/* manifest.json */
{
"permissions": [
"storage",
"alarms"
],
"background": {
"scripts": [
/* Remember to include/import it in the background to enable expired cache purging */
"webext-storage-cache.js"
]
}
}
```
```js
import {CachedValue} from 'webext-storage-cache';
const item = new CachedValue('unique', {
maxAge: {
days: 3,
},
});
(async () => {
if (!(await item.isCached())) {
const cachableItem = await someFunction();
await item.set(cachableItem);
}
console.log(await item.get());
})();
```
The same code could also be written more effectively with `CachedFunction`:
```js
import {CachedFunction} from 'webext-storage-cache';
const cachedFunction = new CachedFunction('unique', {
updater: someFunction,
maxAge: {
days: 3,
},
});
(async () => {
console.log(await cachedFunction());
})();
```
## API
- [CachedValue](./source/cached-value.md) - A simple API getter/setter
- [CachedFunction](./source/cached-function.md) - A memoize-like API to cache your function calls without manually calling `isCached`/`get`/`set`
- `globalCache` - Global helpers, documented below
- `legacy` - The previous Map-like API, documented below, deprecated
### globalCache.clear()
Clears the cache. This is a special method that acts on the entire cache of the extension.
```js
import {globalCache} from 'webext-storage-cache';
document.querySelector('.options .clear-cache').addEventListener('click', async () => {
await globalCache.clear()
})
```
### legacy API
The API used until v5 has been deprecated and you should migrate to:
- `CachedValue` for simple `cache.get`/`cache.set` calls. This API makes more sense in a typed context because the type is preserved/enforced across calls.
- `CachedFunction` for `cache.function`. It behaves in a similar fashion, but it also has extra methods like `getCached` and `getFresh`
You can:
- [Migrate from v5 to v6](https://github.com/fregante/webext-storage-cache/releases/v6.0.0), or
- Keep using the legacy API (except `cache.function`) by importing `webext-storage-cache/legacy.js` (until v7 is published)
```js
import cache from "webext-storage-cache/legacy.js";
await cache.get('my-url');
await cache.set('my-url', 'https://example.com');
```
The documentation for the legacy API can be found on the [v5 version of this readme](https://github.com/fregante/webext-storage-cache/blob/v5.1.1/readme.md#api).
## Related
- [webext-detect](https://github.com/fregante/webext-detect) - Detects where the current browser extension code is being run.
- [webext-options-sync](https://github.com/fregante/webext-options-sync) - Helps you manage and autosave your extension's options.
- [webext-base-css](https://github.com/fregante/webext-base-css) - Extremely minimal stylesheet/setup for Web Extensions’ options pages (also dark mode)
- [webext-dynamic-content-scripts](https://github.com/fregante/webext-dynamic-content-scripts) - Automatically registers your content_scripts on domains added via permission.request
- [More…](https://github.com/fregante/webext-fun)
## License
MIT © [Federico Brigante](https://fregante.com)