Arrays in props.json - adding custom object to array, description for array properties

In the *.props.json file I am able to add properties for objects that either show up as default or can be added from designer by pressing the + button. I can also add description to objects and primitive types inside the objects.


However for arrays containing objects, I have only been able to get them pre-filled by including entire array as default. For properties I have only been able to add empty arrays via the + button in the designer.

  1. Is it possible to define properties that can get added inside array by pressing the + in the designer like we are able to do for other objects?

  2. Is it possible to add descriptions to the parameters inside the array?

The problem here is probably our JSON editor not being 'smart' enough to recognize these situations and autocomplete accordingly. I don't think we have any e.g. Perspective components where this currently works (correct me if I'm wrong) so we would have to treat this as a feature request for the JSON editor.

I think this is what you're looking for.
Use the "items" keyword do define the properties of the array items:

"myArray": {
    "type": "array",
    "items": {
        "type": "object",
        "description": "Some description",
        "properties": {
            "label": {
                "type": "string",
                "description": "Some description",
                "default": "Label"
            "value": {
                "type": "number",
                "description": "Some description",
                "default": 0
    "description": "An array of values with label",
    "default": []