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## Resource: Deprecated: Call Backend Code from the Frontend

## Article: Deprecated: Call Backend Code from the Frontend

## Article Link: https://dev.wix.com/docs/develop-websites-sdk/code-your-site/build-a-custom-backend/web-modules/deprecated-call-backend-code-from-the-frontend.md

## Article Content:

# Deprecated: Call Backend Code from the Frontend

[Web modules](https://dev.wix.com/docs/develop-websites-sdk/code-your-site/build-a-custom-backend/web-modules/about-web-modules.md) allow you to write backend functions that you can easily call from the frontend.

<blockquote class="warning">

**Warning:**
Web modules defined using `.jsw` files are deprecated and you will soon be unable to create new `.jsw` files. However, existing `.jsw` web modules will continue work as expected. Switch to [web module defined using `.web.js` files](https://dev.wix.com/docs/develop-websites-sdk/code-your-site/build-a-custom-backend/web-modules/call-backend-code-from-the-frontend.md) for your current and future projects.

</blockquote>

The following describes how to create, export, and call web module functions.

## Step 1 | Define a function in the backend

Add an exported function to an existing `.jsw` file.

```js
export function myFunction(someParam) {
  // Some functionality to call from the frontend
  return `You passed me ${someParam}`;
}
```

## Step 2 | Set permissions

Set [permissions](https://dev.wix.com/docs/develop-websites-sdk/code-your-site/build-a-custom-backend/web-modules/about-web-modules.md#permissions) for each function in the web module if necessary. Permissions can only be added and updated in the editor's UI. The default permission is **Anyone**.

To set permissions for a web module function:

1. Hover over your web module, click the more actions menu, and select **Edit Web Module Permissions**.  
   The web module permissions panel opens and displays each exported function in your web module.

2. Click the dropdown next to a function name to define its permissions.

## Step 3 | Call the function in the frontend

To call a web method from the frontend:

1. Import the exported web method from the web module you created above:

   ```javascript
   import { myFunction } from "backend/weather.jsw";
   ```

2. Call the imported function:

   ```js
   const fromBackend = await myFunction(someValue);
   ```

   Remember, web module functions are always asynchronous.

## See also

- [About web modules](https://dev.wix.com/docs/develop-websites-sdk/code-your-site/build-a-custom-backend/web-modules/about-web-modules.md)
- [Call backend code from the frontend](https://dev.wix.com/docs/develop-websites-sdk/code-your-site/build-a-custom-backend/web-modules/call-backend-code-from-the-frontend.md)