memorystorage

library0.12.0jsnpmunverified

MemoryStorage is a JavaScript library (v0.12.0) that provides an in-memory implementation of the Web Storage API (localStorage/sessionStorage). It serves as a drop-in replacement for environments where the native Web Storage API is unavailable, such as older browsers or server-side Node.js. The library supports both isolated (namespaced) and shared storage instances, follows the W3C specification, and is distributed as a UMD module compatible with CommonJS, AMD, and ES modules. It is lightweight (~2KB minified), has no dependencies, and is maintained by the Download organization on GitHub.

storage

npm install memorystorage

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · MEMORYSTORAGE

memorystorage

storagejavascriptv0.12.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

MemoryStorage

✓ import MemoryStorage from 'memorystorage'

✗ const { MemoryStorage } = require('memorystorage')

Default import. CommonJS require returns the constructor directly; destructuring fails.

MemoryStorage

✓ const MemoryStorage = require('memorystorage')

CommonJS require works but note that the package exports a single function, not an object with a MemoryStorage property.

MemoryStorage

✓ define(['memorystorage'], function(MemoryStorage) { ... })

AMD module usage for RequireJS.

Create MemoryStorage instances (shared or isolated) and demonstrate basic Web Storage API operations.

import MemoryStorage from 'memorystorage'; // Create a globally shared storage instance const store = MemoryStorage(); store.setItem('key', 'value'); console.log(store.getItem('key')); // 'value' // Create an isolated storage instance with a namespace const isolated = new MemoryStorage('my-app'); console.log(isolated.length); // 0 // All Web Storage API methods are supported: store.removeItem('key'); store.clear(); console.log(store.key(0)); // null

Debug

Known issues

gotchaMemoryStorage can be called with or without 'new'. Both work.

fix

Use either 'new MemoryStorage()' or 'MemoryStorage()'.

affects: all

gotchaThe 'id' property is immutable; assignment is silently ignored in non-strict mode.

fix

Do not attempt to overwrite the 'id' property after construction.

affects: all

Errors

Common errors & fixes

TypeError: MemoryStorage is not a constructor

Importing incorrectly (e.g., using named import instead of default).

fix

Use 'import MemoryStorage from 'memorystorage'' or 'const MemoryStorage = require('memorystorage')'.

TypeError: store.setItem is not a function

If MemoryStorage was imported as an object with a property named 'MemoryStorage', but it's directly the constructor.

fix

Ensure you use default import: 'import MemoryStorage from 'memorystorage''.

Upgrade

Version history

0.12.0latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

25 hits · last 30 days

node

Amazon

Resources

githubhttps://github.com/download/memorystorage ↗

packagememorystorage ↗

homepagehttp://download.github.io/memorystorage ↗