Wix Media events are triggered when certain events occur with files created using the Media API. You can write event handlers that react to these events. Event handler functions receive data that corresponds to the event that has occurred. Use event handlers to create custom responses to media events.

To add a media event handler, add an events.js file to the Backend section of your site if one doesn't already exist. All event handler functions for your site are defined in this file.

Event handler functions are defined using the following pattern:

export function <wixAppName>_<eventName>(event) { }
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For example, an event handler that handles a file being uploaded to the Media Manager looks like this:

export function wixMediaManager_onFileUploaded(event) { }
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Note: Backend events don't work when previewing your site.

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