Question: How to trigger something (function) on adding asset?

Hi, @artf. What is the correct way to trigger a function when an asset is added to the assets by providing the link and then pressing the 'Add Image' button? I am running the open-assets command on an onclick event of a button in a custom panel and then trying to call a function when an image is added to the assets. I am using the following code to trigger a function on adding an image:

editor.on('asset:add', () => {
    // my code
})

The // my code part is running multiple times. (As many times as I open the asset dialog using the button mentioned before) What am I possibly doing wrong?