Handlebar Helper Function: Map

Extracts a specific field from each object in a list, returning a list of those field values. It supports both simple arrays and complex object structures.

This helper is available in the Winter ’26 release of Marketing Cloud Next (API version 65.0).

1{{map list fieldName}}

The function returns a new list containing the values of the specified field from each object in the input list. If the specified field isn’t present in an object, that object is skipped. If a parameter is missing or an element in the list isn’t a valid map, the function throws an exception.

This example shows how to use the map function to extract the age field from each object in the list.

1myList = [
2  {
3    "name": "D’Angelo",
4    "country": "Sweden",
5    "age": 30
6  },
7  {
8    "name": "Miguel",
9    "country": "Canada",
10    "age": 25
11  },
12  {
13    "name": "Lakshmi",
14    "country": "United States"
15  }
16];
17
18{{map myList "age"}}

The function returns [30, 25].

You can chain the map function with other functions such as filter, sort, and flatten.

1myList = [{"name": "D’Angelo", "age": 24}, {"name": "Miguel", "age": 27}, {"name": "Lakshmi", "age": 26}];
2
3{{map (filter myList "age" ">" 25 "number") "name"}}

The function returns ["Miguel", "Lakshmi"].

With complex nested objects, use the flatten function to flatten the nested objects before you map the values, as shown in this example.

1myList = {
2  "orders": [
3    {
4      "items": [
5        {"name": "Reticulated Widget", "price": 100},
6        {"name": "Quantum Toaster", "price": 200}
7      ]
8    },
9    {
10      "items": [
11        {"name": "Retro Encapsulator", "price": 300}
12      ]
13    }
14  ]
15};
16
17{{map (flatten (map myList "items")) "price"}}

The function returns [100, 200, 300].

• Flatten
• Map