PropDefinition

By defining a wildcard property ("#") on the prototype, this will supply a default behavior for items in the list. The default wildcard ("#") definition makes every item run through the "observable" types converter. It looks like:

{
    "#": {
        type: "observable"
    }
}

Setting the wildcard is useful when items should be converted to a particular type.

const Person = DefineMap.extend( { /* ... */ } );

const People = DefineList.extend( {
    "#": Person
} );

The wildcard property has optional added and removed functions that will be called after an item is added or removed from the list with this being the list.

const People = DefineList.extend( {
    "#": {
        added: function( itemsAdded, index ) { /* ... */ },
        removed: function( itemsRemoved, index ) { /* ... */ }
    }
} );