[](https://codecov.io/github/GavinBirkhoff/local-store-pro)
English | [简体中文](https://github.com/GavinBirkhoff/local-store-pro/blob/main/README.zh-CN.md)
The encapsulation of local storage localStorage, provides expiration time setting and subscription functions, provides simple API use, no dependencies, and the compression is only 3.71KB (gzipped: 1.37KB).
## ✨ Features
- Better localStorage, Next localStorage
- Learn and use easily
- Expiration time of support data
- Support for monitoring data changes
- Built with TypeScript, providing full type definition files
## 🪄 Install
```bash
# npm install
npm install local-store-pro
# yarn install
yarn add local-store-pro
#pnpm install
pnpm add local-store-pro
```
## 🏗️ Build
```bash
npm run build
```
## 🧪 Test
```bash
npm test
```
# 🔨 Usage
or manually download and include in your HTML **local-store-pro.min.js**，you can also pass [UNPKG](https://unpkg.com/local-store-pro/lib/) to download：
```html
```
or
```js
import store from 'local-store-pro';
store("test","local-store-pro");
```
## ⚙️ API
### set
Storing data
`store.set(key, data[, expires]);`
or store(key, data[, expires]);
```js
store.set("test","1"); //⇒1
store.set("test","1",3); //⇒1 test expires after 3 seconds
```
### get
Get string data of key
`store.get(key)`
or `store(key)`
```js
store.get("test"); // Get the string data of test
store("test"); // Same function as above
```
### remove
delete data under key `store.remove(key)`
```js
store.remove("test");
```
### clear
clear all `key/data` `store.clear()`
```js
store.clear(); // Will publish all key value changes
```
### has
Check if it exists and return `true/false` `store.has(key)`
```js
store.has("test"); //⇒true
```
### subscribe
Subscribe to test data changes
```js
store.subscribe("test",(e)=>{})
```
For the event variable e, it is an abbreviated object from the StorageEvent object, which provides some practical properties, which can be used to observe the changes of key-value pairs well, as shown in the following table：
```ts
type NextStorageEventValue = Partial | any[] | null | string | number
```
| Property | Type | Description|
| -------- | ------ | ------------------------------------------------------------ |
| key| `string` | The key to store the value, modify, delete according to it |
| oldValue | `NextStorageEventValue` | last value |
| newValue | `NextStorageEventValue` | current new value |
| type| `string` | event type |
| native | `StorageEvent` | native event |
### unsubscribe
Unsubscribe from test data changes
```js
const someName = (e)=>{}
store.subscribe("test",someName)
store.unsubscribe("test",someName) // ⚠️Note that unsubscribe cannot be an anonymous method
store.unsubscribe("test") // ⚠️Note that all subscriptions to test will be cancelled including anonymous functions
```
### getUsed
Get the storage usage of the store
```ts
store.getUsed() // return `0.111 KB`
```
## Compatibility
source：[localStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage)
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera| Safari (WebKit) | iPhone(IOS) | Android | Opera Mobile | Window Phone |
| ------------ | ------ | --------------- | ----------------- | ------ | --------------- | ----------- | ------- | ------------ | ------------ |
| localStorage | 4+ | 3.5+| 8+| 10.50+ | 4+| 3.2+| 2.1+| 11+| 8+ |
## local storage size
`JSON.stringify(localStorage).length` How much capacity is currently occupied
[Detect the upper limit of localstore capacity](https://arty.name/localstorage.html)
## 🌈Version changes
- v1 mainly has a `localStorage` that can set the expiration time and monitor key value changes
- v2 mainly adjusts the enhanced definition of `typescript` types
- v3 mainly enhances the return value parameter of the standard monitoring callback function, optimizes and adjusts the type definition
- v?...introducing namespaces, and sessions, etc.