ozee-cachejs
v1.0.0
Published
A cache lib based on LocalStorage and SessionStorage
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ozeeReadme
Cachejs
Cachejs is a javascript library that uses LocalStorage and SessionStorage for cache datas on your application.
Requirements
Web browser with LocalStorage and SessionStorage :
- Chrome 5+
- Firefox 3.5+
- IE 8+
- Safari 4+
- Opera 10.50+
- Safari Mobile iOS 3.2
- Android 2.1+
Installation
With npm
With bower
Other method
Download this repository and copy files on your project (not recommended)
Quick Start
Load the lib :
<html>
<head>
<script src="/lib-path/cachejs/dist/cache.min.js"></script>
</head>
</html>Store data in local storage
Cachejs.Local.set('key', 'local');Store data in session storage
Cachejs.Session.set('key', 'session');Get data in local storage
Cachejs.Session.get('key'); // return 'local'Get data in session storage
Cachejs.Session.get('key'); // return 'session'Classes
Cachejs.Local (use localStorage)
The localStorage property allows you to access a local Storage object. localStorage is similar to sessionStorage. The only difference is that, while data stored in localStorage has no expiration time, data stored in sessionStorage gets cleared when the browsing session ends—that is, when the browser is closed.
Cachejs.Session (use sessionStorage)
The sessionStorage property allows you to access a session Storage object. sessionStorage is similar to Window.localStorage, the only difference is while data stored in localStorage has no expiration set, data stored in sessionStorage gets cleared when the page session ends. A page session lasts for as long as the browser is open and survives over page reloads and restores. Opening a page in a new tab or window will cause a new session to be initiated, which differs from how session cookies work.
Methods
Cachejs.Local and Cachejs.Session have access to the same functions.
Set
Add the key to the storage, or update that key's value if it already exists
set(key, value, expiration = null, readOnly = false)
Parameters
- {string} key : name of the key you want to create/updat
- {mixed} value : value you want to give the key you are creating/updating (string, int, array, object...)
- {mixed} expire : (int) the data expires in x seconds || (falsy) no expiration
- {mixed} readOnly : (true) prohibit modification || (falsy)
Return
Boolean : (true) success || (false) fail
Exemples
- String, int...
// String
Cachejs.Local.set('key', 'value');
// Array
Cachejs.Local.set('key', [1,2,3]);
// Object
Cachejs.Local.set('key', {fistname: 'James', lastname: 'Bond'});
// With expiration
Cachejs.Local.set('key', 'value', 3600); // data expires in 1 hour
// ReadOnly
Cachejs.Local.set('key', 'value', null, true); // return true
Cachejs.Local.set('key', 'change'); // return false
Cachejs.Local.get('key'); // return 'value'Get
Get only value, remove if expired
get(key)
Parameters
- {string} key
Return
Mixed : the value OR null if the data has expired or not exist
Exemples
Cachejs.Local.set('key', 'value');
Cachejs.Local.get('key'); // 'value'
Cachejs.Session.get('key'); // null
Cachejs.Local.set('key', 'value', 1);
// sleep 2 secondes or more
Cachejs.Local.get('key'); // nullRemove
Remove data if don't readonly
remove(key)
Parameters
- {string} key
Return
Boolean : (true) success || (false) fail
Exemples
Cachejs.Local.set('key', 'value');
Cachejs.Local.get('key'); // 'value'
Cachejs.Local.remove('key'); // true
Cachejs.Local.get('key'); // null
// ReadOnly
Cachejs.Local.set('key', 'value', null, true);
Cachejs.Local.get('key'); // 'value'
Cachejs.Local.remove('key'); // false
Cachejs.Local.get('key'); // 'value'Clear
Remove all datas
clear()
Return
true
Exemples
Cachejs.Local.set('key', 'value');
Cachejs.Local.set('key2', 'value', null, true);
Cachejs.Local.clear(); // true
Cachejs.Local.get('key'); // null
Cachejs.Local.get('key2'); // nullisExpired
Indicates whether the value has expired
isExpired(key)
Parameters
- {string} key
Return
Boolean : (true) is expired || (false) is not expired
Exemples
// No expiration
Cachejs.Local.set('key', 'value');
Cachejs.Local.isExpired('key'); // false
// No expired
Cachejs.Local.set('key', 'value', 999999);
Cachejs.Local.isExpired('key'); // false
// Expired
Cachejs.Local.set('key', 'value', 1);
// sleep 1 second or more
Cachejs.Local.isExpired('key'); // trueisReadonly
Indicates whether the value is readonly
isReadonly(key)
Parameters
- {string} key
Return
Boolean : (true) is read only || (false) is not read only
Exemples
// No readonly
Cachejs.Local.set('key', 'value');
Cachejs.Local.isReadonly('key'); // false
// is readonly
Cachejs.Local.set('key', 'value', null, true);
Cachejs.Local.isReadonly('key'); // true