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Permissions needed to call the function in frontend code.

permissions

Permissions

_function

Function

Defines a backend function that can be called from the frontend.

The `webMethod()` function is a wrapper used to export functions from backend code that can be called from the frontend. 

The `permissions` parameter is used to define the permissions needed to call the function in frontend code. Import
the `Permissions` enum from the `wix-web-module` module to define the permissions. 
The permission options are:
 - `Permissions.Anyone`: Any site visitor can call the function.
 - `Permissions.Admin`: Only site admins can call the function.
 - `Permissions.SiteMember`: Only site members can call the function.


Web methods must be defined in files with a `.web.js` extension.

// Exporting a backend function from a '.web.js' file:
import {Permissions, webMethod} from "wix-web-module";

export const multiply = webMethod(Permissions.Anyone, (a,b) => a * b);

// Using the function in frontend code:
import {multiply} from "backend/multiply.web";

$w.onReady(async function () {
  multiply(5, 3).then((result) => {
    console.log(result); // Logs 15
  });
});

Export a backend function and use it in frontend code

webMethod

# Introduction
The Web Modules API allows you to define functions in your backend code that can be called from your site's frontend code. In order to call the function from the frontened, you need to define the necessary permissions. 

To use the Web Modules API, import the `webMethod` function and the `Permissions` enum from the `wix-web-module` module:
```javascript
import { webMethod, Permissions } from 'wix-web-module';
```
Learn more about [working with the Web Modules API](https://support.wix.com/en/article/about-web-methods).