Form Engine — Component API Reference

Complete props, emits, slots, and exposed methods for all Form Engine components and field types.

---

MapoForm

The main form renderer. Takes a descriptor array and a model, then renders the appropriate field components.

Descriptor typing guidance:

• Use FieldDescriptor<T>[] when the form uses only built-in field types. This keeps strict compile-time checks on attrs and catches typos early.
• Use AnyFieldDescriptor<T>[] only when the form includes custom field types.
• AnyFieldDescriptor does not prove that a field type is present in the registry. Registry resolution is runtime behavior; unresolved types render MapoUnknownField instead of crashing.

Props

Prop	Type	Default	Description
modelValue	T	— required	The form data object (v-model).
fields	AnyFieldDescriptor<T>[]	— required	Array of field descriptors defining the form layout.
errors	Record<string, string[]>	{}	Server-side validation errors keyed by field path.
languages	string[]	[]	Available language codes for translated fields.
currentLang	string	''	Active language code. Controlled externally (by MapoDetail).
readonly	boolean	false	Make all fields read-only.
immediate	boolean	false	Run client validators immediately without waiting for the first submit.
registry	FieldRegistry	—	Field component registry. Auto-injected from $mapoFormRegistry if omitted.

Emits

Event	Payload	Description
update:modelValue	T	Emitted whenever any field changes.

Slots

Slot	Description
field.{key}	Override the rendering of a specific field. Receives { field: FieldDescriptor, model: T | undefined, currentLang: string }.

Exposed Methods

Method	Signature	Description
submit	(handler: (payload, isNew) => Promise<void>, isNew?: boolean) => Promise<void>	Run all validators; on success call handler with the full model (isNew=true) or the diff patch (isNew=false).
validateClient	() => { valid: boolean; errors: Record<string, string> }	Run all synchronous client validators. Returns valid and a map of field errors.
resetDirty	() => void	Reset the dirty-tracking baseline (call after a successful save).
getPatch	() => Partial<T>	Return only the fields changed since the last resetDirty.
isDirty	Ref<boolean>	Reactive flag — true when any field has changed since the last baseline.
isLoading	Ref<boolean>	Reactive flag — true while the submit handler is executing.

---

MapoFormField

Low-level wrapper that resolves a FieldDescriptor to its registered component, handles label, hints, errors, and slot injection.

Props

Prop	Type	Default	Description
descriptor	AnyFieldDescriptor	— required	The field configuration object.

Slots

Slot	Description
field.{key}.label	Override the field label. Receives { descriptor, label, model, currentLang }.
field.{key}.before	Content rendered before the field wrapper. Receives { descriptor, model, currentLang }.
field.{key}.prepend	Content prepended inside the field control. Receives { descriptor, model, currentLang }.
field.{key}.append	Content appended inside the field control. Receives { descriptor, model, currentLang }.
field.{key}.hint	Override the hint text. Receives { descriptor, model, currentLang }.
field.{key}.after	Content rendered after the field wrapper. Receives { descriptor, model, currentLang }.

---

MapoFormGroup

Collapsible section that groups related fields under a heading.

Props

Prop	Type	Default	Description
name	string	— required	Group identifier.
label	string	—	Group heading label.
fields	FieldDescriptor[]	— required	Fields belonging to this group.
initialExpanded	boolean	—	Whether the group starts expanded.

---

MapoFormFlatSection

Flat grid layout for fields that belong to no group. Renders fields in a 12-column responsive grid and provides the same field-expand overlay as MapoFormGroup — without a collapsible heading.

Used internally by MapoForm for fields that have no group or tab set.

Props

Prop	Type	Default	Description
fields	FieldDescriptor[]	— required	Fields to render in the grid.

Slots

Forwards all field.* slot names to each MapoFormField child (same forwarding contract as MapoFormGroup).

---

MapoFormTabs

Tab-based layout for organizing fields into named sections.

Props

Prop	Type	Default	Description
tabs	TabEntry[]	— required	Tab definitions. Each entry has { label, fields }.

---

MapoFocusPortal

Full-screen overlay for editing a Repeater item in focus mode. Mount once inside your default layout.

Props / Emits / Slots

None — controlled internally by MapoRepeater via a shared provide/inject.

---

MapoUnknownField

Fallback field rendered when no matching component is found in the registry.

Props

Prop	Type	Default	Description
modelValue	unknown	— required	Current value.
descriptor	FieldDescriptor	— required	Field descriptor.
errors	string[]	—	Validation error messages.
readonly	boolean	—	Read-only mode.
disabled	boolean	—	Disabled mode.

Emits

Event	Payload	Description
update:modelValue	unknown	Emitted on value change.

---

Field Components

All field components share the same base interface:

Props: { modelValue, descriptor, errors?, readonly?, disabled? }
Emits: { 'update:modelValue': value }

MapoDateField

Date-only picker. Serializes as YYYY-MM-DD.

Prop	Type	Description
modelValue	unknown	ISO date string or null.
descriptor	DateDescriptor	Field configuration.

MapoTimeField

Time-only picker. Emits HH:MM format.

Prop	Type	Description
modelValue	unknown	Time string or null.
descriptor	DateDescriptor	Field configuration.

MapoDateTimeField

Combined date + time picker with optional timezone handling (naive / UTC).

Prop	Type	Description
modelValue	unknown	ISO datetime string or null.
descriptor	DateDescriptor	Field configuration. attrs.tz controls timezone mode.

descriptor.attrs

Key	Type	Default	Description
tz	'naive' | 'UTC'	'naive'	Timezone handling mode.

---

MapoSeoPreview

SEO metadata editor with live SERP preview.

Prop	Type	Description
modelValue	unknown	{ title?, description?, permalink? }
descriptor	SeoDescriptor	Field configuration.

---

MapoFileField

File upload field with current-file preview, remove button, and optional image thumbnail. Replaces the plain <input type="file"> used for the 'file' registry type.

Prop	Type	Description
modelValue	unknown	A File object, a URL string, or null.
descriptor	FileDescriptor	Field configuration.

descriptor.attrs

Key	Type	Default	Description
accept	string	—	MIME type filter forwarded to the <input> (e.g. 'image/*').
maxSize	number	—	Maximum file size in bytes (UI hint only — not enforced client-side).

When modelValue is a URL string ending in an image extension (.jpg, .png, .webp, etc.) a thumbnail is shown alongside the filename.

---

MapoWygEditor

WYSIWYG rich-text editor powered by TipTap. Output is sanitized HTML.

Prop	Type	Description
modelValue	unknown	HTML string.
descriptor	EditorDescriptor	Field configuration.

The toolbar includes a disabled Insert Image button (placeholder for Phase 6 — Media Manager). It becomes active once MapoMediaManagerDialog is available.

---

MapoMapField

Geographic coordinate picker with a Leaflet map and manual lat/lng inputs.

Prop	Type	Description
modelValue	unknown	{ lat: number, lng: number } | null
descriptor	MapDescriptor	Field configuration.

descriptor.attrs

Key	Type	Default	Description
defaultLat	number	41.9	Initial map latitude when no value is set.
defaultLng	number	12.5	Initial map longitude when no value is set.
zoom	number	6	Initial map zoom level.

---

MapoFksField

Foreign key selector with remote search. Supports single and multi-select.

Prop	Type	Description
modelValue	unknown	Selected item object, array of items, or ID(s).
descriptor	FksDescriptor	Field configuration.

descriptor.attrs

Key	Type	Default	Description
endpoint	string	— required	API endpoint for option search. Relative paths (no leading /) are automatically normalized by prepending /.
itemText	string	'name'	Model field to display as label.
itemValue	string	'id'	Model field to use as value.
multiple	boolean	false	Allow multi-selection.
returnObject	boolean	true	Emit the full object instead of only the ID.

---

MapoRepeater

Dynamic list field with drag-and-drop reordering, bulk selection, duplication, and focus mode.

Prop	Type	Description
modelValue	unknown	Array of item objects.
descriptor	RepeaterDescriptor	Field configuration.

descriptor.attrs

Key	Type	Default	Description
templates	Record<string, FieldDescriptor[]>	—	Named field templates (one per item type).
previewLabel	(item, index) => string	—	Callback to generate an item's collapsed preview label.
defaultExpanded	boolean	false	Start all items expanded.
allowDuplicate	boolean	true	Show the Duplicate action on each item.
showPositionField	boolean	false	Show a numeric position input in each item's header for explicit reordering.
minItems	number	—	Minimum number of items (validated on submit).
maxItems	number	—	Maximum number of items (Add button hidden when reached).
confirmDelete	boolean	true	Show a confirmation dialog before deleting an item.
miniCard	(item, idx) => { title, subtitle, thumbnail, statusColor }	—	Config for the compressed mini-card view.
compressThreshold	number	3	Number of items above which the list switches to mini-card view.

---

MapoRepeaterItem

Single item inside a MapoRepeater. Handles both full-form and mini-card views.

Props

Prop	Type	Default	Description
item	Record<string, unknown>	— required	Item data.
fields	FieldDescriptor[]	— required	Item form fields.
index	number	— required	Item index in the parent array.
errorPrefix	string	— required	Error key prefix (e.g. 'items.0').
parentErrors	Record<string, string[]>	— required	Errors from the parent form.
languages	string[]	— required	Language codes.
currentLang	string	— required	Active language.
readonly	boolean	— required	Read-only mode.
registry	FieldRegistry	— required	Field registry.
previewLabel	(item, index) => string	—	Callback to generate the collapsed preview label.
defaultExpanded	boolean	— required	Initial expanded state.
allowDuplicate	boolean	—	Show Duplicate action.
repeaterDescriptor	RepeaterDescriptor	—	Parent repeater descriptor (for mini-card config).
totalItems	number	—	Total number of items in the parent repeater.
selected	boolean	—	Whether this item is bulk-selected.
selectionMode	boolean	—	Whether bulk selection mode is active.

Emits

Event	Payload	Description
update:item	Record<string, unknown>	Item data changed.
delete	—	Delete this item.
duplicate	—	Duplicate this item.
move-up	—	Move this item one position up.
move-down	—	Move this item one position down.
move-to	index: number	Move this item to a specific index.
toggle-select	—	Toggle bulk-selection of this item.

Slots

Slot	Description
actions	Custom action buttons in the item toolbar.

---

NUI Wrapper Fields

Thin wrappers around Nuxt UI primitives that integrate with the form registry system. They inherit all attributes and props from the underlying Nuxt UI component.

Component	Wraps	Registry keys	Notes
NuiInput	UInput	'text', 'email', 'url', 'number', 'color'	number/email/url/color set the native type via registry attrs.
NuiTextarea	UTextarea	'textarea'
NuiSlider	USlider	'slider'
NuiCheckbox	UCheckbox	'boolean'
NuiSwitch	USwitch	'switch'
NuiSelectMenu	USelectMenu	'select'	Accepts items ({ label, value } or strings) and legacy options ({ text, value }); shapes are normalised internally.