82 lines
1.8 KiB
Markdown
82 lines
1.8 KiB
Markdown
sessionStorage & localStorage for NodeJS
|
|
===
|
|
|
|
An inefficient, but as W3C-compliant as possible using only pure JavaScript, `DOMStorage` implementation.
|
|
|
|
Purpose
|
|
----
|
|
|
|
This is meant for the purpose of being able to run unit-tests and such for browser-y modules in node.
|
|
|
|
Usage
|
|
----
|
|
|
|
```javascript
|
|
var Storage = require('dom-storage')
|
|
|
|
// in-file, doesn't call `String(val)` on values (default)
|
|
, localStorage = new Storage('./db.json', { strict: false, ws: ' ' })
|
|
|
|
// in-memory, does call `String(val)` on values (i.e. `{}` becomes `'[object Object]'`
|
|
, sessionStorage = new Storage(null, { strict: true })
|
|
|
|
, myValue = { foo: 'bar', baz: 'quux' }
|
|
;
|
|
|
|
localStorage.setItem('myKey', myValue);
|
|
myValue = localStorage.getItem('myKey');
|
|
|
|
// use JSON to stringify / parse when using strict w3c compliance
|
|
sessionStorage.setItem('myKey', JSON.stringify(myValue));
|
|
myValue = JSON.parse(localStorage.getItem('myKey'));
|
|
```
|
|
|
|
API
|
|
---
|
|
|
|
* getItem(key)
|
|
* setItem(key, value)
|
|
* removeItem(key)
|
|
* clear()
|
|
* key(n)
|
|
* length
|
|
|
|
### Options
|
|
|
|
* strict - whether to stringify strictly as text `[Object object]` or as json `{ foo: bar }`.
|
|
* ws - the whitespace to use saving json to disk. Defaults to `' '`.
|
|
|
|
Tests
|
|
---
|
|
|
|
```javascript
|
|
0 === localStorage.length;
|
|
null === localStorage.getItem('doesn't exist');
|
|
undefined === localStorage['doesn't exist'];
|
|
|
|
localStorage.setItem('myItem');
|
|
"undefined" === localStorage.getItem('myItem');
|
|
1 === localStorage.length;
|
|
|
|
localStorage.setItem('myItem', 0);
|
|
"0" === localStorage.getItem('myItem');
|
|
|
|
localStorage.removeItem('myItem', 0);
|
|
0 === localStorage.length;
|
|
|
|
localStorage.clear();
|
|
0 === localStorage.length;
|
|
```
|
|
|
|
Notes
|
|
---
|
|
|
|
* db is read in synchronously
|
|
* No callback when db is saved
|
|
* Doesn't not emit `Storage` events (not sure how to do)
|
|
|
|
License
|
|
-------
|
|
|
|
* [Apache2](http://www.apache.org/licenses/LICENSE-2.0)
|