Field formatters define the way in which a field type will be presented. These formatters return the render array information to be processed by the theming layer. Field formatters are configured on the display mode interfaces.
In this recipe, we will create a formatter for the field created in the Creating a custom field type recipe in this chapter. The field formatter will display the first and last names with some settings.
Create a new module like the one existing in the first recipe. We will refer to the module as
mymodule throughout the recipe. Use your module's appropriate name.
src/Plugin/Field/FieldFormatterdirectory in the module's base location. The