How to display the placehoder only when editor is empty? (like in previous versions of Editor.js)

```
this.editor = new EditorJS({
holder: this.contentTarget,
data: this.contentValue,
placeholder: "Let's write an awesome newsletter...",
// ...
```

The above code used to display the placeholder only when the editor was empty.

Now, upgrading Editor.js to the latest version, it displays the placeholder for each empty paragraph...

How can I show that placeholder only when editor is empty? (like in previous versions of Editor.js)