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# SDK Introduction EdgerOS Web-SDK is a front-end development kit that provides various interactive interfaces for the front end of EdgerOS App, and the front end of EdgerOS App correctly uses Web-SDK. EdgerOS Web-SDK supports both `JavaScript` and `TypeScript` development. ## npm install you can use command: ```npm i @edgeros/web-sdk``` to install EdgerOS Web-SDK. + TypeScript ```typescript import '@edgeros/web-sdk' ``` + JavaScript ```html ``` ## Test After the `@edgeros/web-sdk` module is correctly import, the browser `window` object will contain the `edger` member: ```javascript console.log(window.edger); // Web-SDK object show ``` ## Style Most Web-SDK functions return `Promise` objects, for example, the following function obtains the Web-SDK version: ```javascript edger.version().then(data => { console.log('Version:', data.version); }).catch(error => { console.error(error); }); ``` # Web-SDK functions ## Security + App front-end and back-end secure communication specifications See details: [Security](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/security.html) ## State & gestures + Front-end state and gestures. See details: [State](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/state.html) ## Account + Web-SDK provides information about users who are currently accessing EdgerOS device. See details: [Account](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/account.html) ## Notify + App calls this interface to pop up system notify information. See details: [Notify](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/notify.html) ## Permission + App front end can obtain and check related permissions by using these functions. See details: [Permission](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/permission.html) ## Share + Apps can share messages with each other by using these functions. See details: [Share](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/share.html) ## Network + These functions provide current EdgerOS device network working information. See details: [Network](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/network.html) ## Language + App can get EdgerOS current language information. See details: [Language](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/language.html) ## Theme + Get the current display theme of EdgerOS, the App can dynamically select its own display style according to the theme information. See details: [Theme](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/theme.html) ## Orientation + Obtain and control the current display orientation of EdgerOS. See details: [Orientation](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/orientation.html) ## Mobile + Operate current mobile functions, such as camera, etc. See details: [Mobile](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/mobile.html) ## AcoPay + EdgerOS online payment system **翼辉支付**. This payment system uses **WeChat Pay** or **Alipay** payment channels. App can use this payment system to complete on-site payments. See details: [AcoPay](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/acopay.html) ## SafeArea + EdgerOS App can get current safeArea information. [SafeArea](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/safe-area.html) ## Download + EdgerOS provides download function. See details: [Download](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/download.html) ## Filesystem + EdgerOS provides filesystem function. See details: [Filesystem](https://www.edgeros.com/edgeros/api/FRONT-END%20SDK/web-sdk/filesystem.html) ---