FeatureFormViewModel

let featureForm = new FeatureForm({
  viewModel: { // Autocasts as new FeatureFormViewModel()
    layer: featureLayer   // Associates the FeatureForm to the layer
  },
  container: "formDiv"
});

Property Overview

Property Details

declaredClass Stringreadonly inherited

The name of the class. The declared class name is formatted as esri.folder.className.

feature Graphic

The associated feature containing the editable attributes. A common way to access this is via the MapView or SceneView's hitTest() method.

Example:

// Check if a user clicked on an incident feature.
view.on("click", function(event) {
  view.hitTest(event).then(function(response) {
    // Display the attributes of selected incident feature in the form
    if (response.results[0].graphic && response.results[0].graphic.layer.id == "incidentsLayer") {
       formVM.feature = result.results[0].graphic
    }
  });
});

fieldConfig FieldConfig[]|FieldGroupConfig[]autocast

Deprecated since version 4.16. Use FieldElement and/or GroupElement instead.

Array of individual or grouped field configuration objects. This is where you specify what fields to display and how you wish to display them.

It is recommended to set field configurations via FieldElement(s) or GroupElement(s) within the form's template.

formTemplate FormTemplateautocast

Since: ArcGIS API for JavaScript 4.16

The associated template used for the form.

The formTemplate is where you configure how the form should display and set any associated properties for the form, e.g. title, description, field elements, etc.

See also:

• Sample - Update Feature Attributes

• Sample - Advanced Attribute Editing

inputFields InputField[]|InputFieldGroup[]readonly

The input fields and/or grouped field rendered by the FeatureForm widget.

layer FeatureLayer|SceneLayer

Layer containing the editable feature attributes. If this layer is not specified, it is the same as the graphic's layer.

state Stringreadonly

The widget's state. Possible values are in the table below.

Value	Description
ready	Dependencies are met and has valid property values.
disabled	Dependencies are missing and cannot provide valid inputs.

Possible Values:"ready"|"disabled"

Default Value:disabled

valid Boolean

Indicates whether all input fields are valid.

Method Overview

Method Details

emit(type, event){Boolean}

Emits an event on the instance. This method should only be used when creating subclasses of this class.

Parameters:

type String The name of the event.

event Object optional The event payload.

Returns:

Type	Description
Boolean	true if a listener was notified

findField(fieldName){InputField}

Convenience method to find input fields.

Parameter:

fieldName String The input field to find.

Returns:

Type	Description
InputField	Returns an instance of the InputField.

getValues(){Object}

Returns all of the field values, regardless of whether or not they were updated.

Returns:

Type	Description
Object	An object of key-value pairs of field names with their values.

See also:

• submit event

• submit() method

Example:

function updateFeature() {
  // Get the updated field values
  const attributes = formVM.getValues();
  // Call applyEdits on the feature layer
  layer.applyEdits({
    // Pass in the updated field values
    updateFeatures: [{ attributes }]
  });
}

hasEventListener(type){Boolean}

Indicates whether there is an event listener on the instance that matches the provided event name.

Parameter:

type String The name of the event.

Returns:

Type	Description
Boolean	Returns true if the class supports the input event.

on(type, listener){Object}

Registers an event handler on the instance. Call this method to hook an event with a listener. See the Events summary table for a list of supported events.

Parameters:

type String|String[] An event or an array of events to listen for.

listener Function The function to call when the event fires.

Returns:

Type	Description
Object	Returns an event handler with a remove() method that should be called to stop listening for the event(s). Property Type Description remove Function When called, removes the listener from the event.

Example:

view.on("click", function(event){
  // event is the event handle returned after the event fires.
  console.log(event.mapPoint);
});

setValue(fieldName, value)

Since: ArcGIS API for JavaScript 4.21

Used to set the updated field value.

This renders the new value within the form but does not update the underlying input feature's attributes.

Parameters:

fieldName String The target field to update.

value Number|String|null The value to set on the target field.

submit()

Fires the submit event.

Example:

// Listen for when 'submit' is called.
// Once it is fired, update the feature.
formVM.on("submit", updateFeature);

// When the DOM's button (btnUpdate) is clicked,
// Update attributes of the selected feature.
document.getElementById("btnUpdate").onclick = function() {
  // Fires feature form's submit event.
  formVM.submit();
}

Event Overview

{valid: String[],invalid: String[],values: Object}

{layer: FeatureLayer,feature: Graphic,fieldName: String,value: Number,String,null,valid: Boolean}

Event Details

submit

Fires when the submit() method is called. Call FeatureLayer.applyEdits() method to update a feature's attributes.

Properties:

valid String[] The valid field names.

invalid String[] The invalid field names.

values Object An object of key-value pairs of field names with all of their values, regardless of whether or not they were updated.

See also:

• submit()

• getValues()

Example:

// Listen to the feature form's submit event.
featureForm.on("submit", function(){
  if (editFeature) {
    // Grab updated attributes from the form.
    const updated = featureForm.getValues();

    // Loop through updated attributes and assign
    // the updated values to feature attributes.
    Object.keys(updated).forEach(function(name) {
      editFeature.attributes[name] = updated[name];
    });

    // Setup the applyEdits parameter with updates.
    const edits = {
      updateFeatures: [editFeature]
    };
    applyEdits(edits);
  }
});

value-change

Fires when a field value is updated.

Properties:

layer FeatureLayer The associated feature layer.

feature Graphic The associated feature.

fieldName String The updated field.

value Number|String|null The updated field value.

valid Boolean When true, the value conforms to the field's definition.