Swap out Image src

Hi,

I've been doing so much reading on GrapesJs to find out how to build a component and assign it to a block. But after some time, I've figured using components isn't the right way to go.

I'm looking to swap out the image src and set a data-src to the image, however, I only want to do this on the save.

I have a storage manager setup, which passes data simply using the data['html'] into a text area.

editor.StorageManager.add('simple-storage', {
store(data, clb, clbErr) {
const html = data['gjs-html'];
}
});

Is there any route that Grapes can do this?

Thanks