***
title: "FormInputComponent"
generated: true
---------------
This interface should be implemented by any component being used as a custom input. For example,
inputs for custom fields, or for configurable arguments.
```ts title="Signature"
interface FormInputComponent {
isListInput?: boolean;
readonly: boolean;
formControl: FormControl;
config: C;
}
```
### isListInput
\
Should be set to `true` if this component is designed to handle lists.
If `true` then the formControl value will be an array of all the
values in the list.
### readonly
\
This is set by the Admin UI when consuming this component, indicating that the
component should be rendered in a read-only state.
### formControl
\
This controls the actual value of the form item. The current value is available
as `this.formControl.value`, and an Observable stream of value changes is available
as `this.formControl.valueChanges`. To update the value, use `.setValue(val)` and then
`.markAsDirty()`.
Full documentation can be found in the [Angular docs](https://angular.io/api/forms/FormControl).
### config
\
The `config` property contains the full configuration object of the custom field or configurable argument.