[Question] How to run command for a block component?

To achieve this, you can listen to the drag event of the editor:

editor.on('block:drag:stop', component => {
    // identify your component and do something cool :)
});

@NicoEngler Thank you for reply! although, I'm not sure how to insert an image from image modal into the link-block component

editor.on('block:drag:stop', model => {
      if (model.getName() === 'Link') {
        editor.runCommand('open-assets', {
          target: this.editor.getSelected()
        });
      }
    });

if i do this, nothing happens even after i select an image from the modal @artf Is there any way to do that?

Plus, the modal is empty initially before I open up asset manager by using Image component. I don't know why..

I´m afraid I can't assist further without playing around with the code myself. Though I can help debugging if you shoot up an example on codepen or similar.