---
title: DataItem
framework: tvmljs
role: symbol
role_heading: Instance Method
path: tvmljs/dataitem/2897826-dataitem
---

# DataItem

Creates a new data item.

## Declaration

```data
new DataItem(
    in String type, 
    in String identifier
);
```

## Parameters

- `type`: The group identifier that associates the data item to a prototype attribute.
- `identifier`: A unique identifier for the data item.

## Discussion

Discussion Each data item in the same type group must have a unique identifier. Assign any other JSON object keys to the data item after it has been created. Listing 1 shows JSON objects being mapped to data items. The url and title keys and values are added to each data item after creation. let newItems = results.map((result) => {     let objectItem = new DataItem(result.type, result.ID);     objectItem.url = result.url;     objectItem.title = result.title;     return objectItem; });