Kando

Kando is a versatile and lightweight 2kb gzip storage utility that simplifies data management in both localStorage and sessionStorage. Unlike other storage packages, Kando offers an intuitive API that enables effortless manipulation of single values, arrays, and objects, while providing robust support for nested paths, namespaces, and data expiration in session storage. Designed for compatibility with both browser and Node.js environments, Kando includes an in-memory fallback for situations where storage APIs are not available. Whether you're building a simple web application or a complex Node.js project, Kando enhances your storage experience with its flexible and user-friendly approach.

Why Use Kando?

• Cross-Environment Support: Use in both browser and Node.js environments, with an automatic Map fallback.
• Namespace Management: Organize storage by namespaces, simplifying data retrieval and removal.
• Nested Path Access: Access deeply nested properties with dot notation.
• Data Expiration: Set expiration times for session data.
• Flexible Storage: Supports single values, arrays, and objects.

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Installation

Node.js

Install Kando with npm:

npm install kando-storage

Browser

<script src="path/to/kando.js"></script>

Examples:

Nodejs

const kando = require('kando-storage');

Basic Usage Examples

Kando offers flexible functions for setting, retrieving, and deleting data, all with dot notation for accessing deeply nested properties.

Setting and Retrieving Data

Single Values

// Set a single value in local storage
kando('local.appSettings.theme', 'dark');

// Retrieve a single value
const theme = kando('local.appSettings.theme'); // 'dark'

Objects and Arrays

// Set an object
kando('local.user.profile', { name: 'Alice', age: 30 });

// Retrieve an object
const profile = kando('local.user.profile'); // { name: 'Alice', age: 30 }

// Set an array
kando('local.user.permissions', ['read', 'write']);

// Retrieve an array
const permissions = kando('local.user.permissions'); // ['read', 'write']

Nested Properties

// Update a nested property within an object
kando('local.user.profile.name', 'Alice Johnson');

// Retrieve the updated profile
const updatedProfile = kando('local.user.profile'); // { name: 'Alice Johnson', age: 30 }

Clearing Data Examples

Kando allows you to remove specific keys or entire namespaces with ease.

Removing Specific Keys

// Remove a specific key
kando('local.user.profile.name', null); // Only removes 'name' from profile

// Example array: ['read', 'write', 'delete']
kando('local.user.permissions', ['read', 'write', 'delete']);

// Example update/replace array key
kando('local.user.permissions[1]', 'view');

// Remove an element from the array
kando('local.user.permissions[1]', null); // Now permissions will be ['read', 'delete']

Clearing an Entire Namespace

// Remove all data under the 'user' namespace
kando('local.user', null);

Session Storage with Expiration

For session storage, Kando supports setting an expiration time in seconds.

// Store a session value with a 60-second expiration
kando('session.tempData', 'Temporary Data', 60);

// Retrieve it before expiration
const tempData = kando('session.tempData'); // 'Temporary Data'

// After 60 seconds, it will no longer be available

Advanced Examples

Namespaced Data with Nested Objects and Arrays

// Store a namespaced object with arrays
kando('local.appConfig', {
  theme: 'dark',
  languages: ['en', 'es', 'fr'],
  settings: { notifications: true, autoSave: false }
});

// Access nested array item
const languages = kando('local.appConfig.languages'); // ['en', 'es', 'fr']

// Update a setting within the nested object
kando('local.appConfig.settings.notifications', false);


// Add a new language to the languages array
kando('local.appConfig.languages[3]', 'de'); // ['en', 'es', 'fr', 'de']

Using Kando with Storage Fallback

If localStorage or sessionStorage is unsupported (such as in certain Node.js environments), Kando automatically falls back to an in-memory Map.

// This will use the Map if storage APIs are unavailable
kando('local.userData', { id: 1, name: 'Bob' });
const userData = kando('local.userData'); // { id: 1, name: 'Bob' }

API Reference

kando(typePath, data = undefined, expiration = null) The core Kando function for all storage operations. Allows setting, retrieving, and removing data with support for namespaces and expiration.

Parameters

• typePath (string): A string that specifies the storage type (local or session) and the key path, separated by dots.
  • Examples: 'local.appSettings.theme', 'session.user.preferences.language'.
• data (any, optional): The value to set at the specified path. Options include:
  • undefined: Retrieves the current value at the path.
  • null: Deletes the specified key or namespace.
  • Any value: Sets or updates data at the path.
• expiration (number, optional): Expiration time in seconds, only applicable for sessionStorage.

Return Value

• Retrieving Data: Returns the current value if data is not provided.
• Setting Data: Returns true upon successful set or update.
• Removing Data: Returns null if the key or namespace does not exist.

Compatibility Check

Kando internally verifies storage compatibility with localStorage and sessionStorage. If compatibility isn’t met, it defaults to an in-memory Map.

Browser/Nodejs Support

Chrome	Firefox	Safari	Opera	Edge	Nodejs
Latest ✔	Latest ✔	Latest ✔	Latest ✔	Latest ✔	Latest ✔

Contributing

Feel free to submit issues or pull requests to improve the package. Contributions are welcome!

License

This package is open-source software licensed under the MIT license.