Custom properties

Property definitions drive the properties sidebar. You can add new properties (persisted into the structure JSON automatically) or override built-in ones.

Add to every element

provideNgxViewBuilderExtensions({
  globalProperties: {
    trackingId: {
      label: 'Tracking ID',
      type: 'text',
      category: 'general',
      hint: 'Analytics identifier rendered as data-tracking-id.',
    },
  },
});

Add or override per element type

provideNgxViewBuilderExtensions({
  elementProperties: {
    button: {                       // element type
      analyticsEvent: {             // new property
        label: 'Analytics event', type: 'text', category: 'general',
      },
      label: { hidden: true },      // hide a built-in property
    },
  },
});

Runtime equivalents: api.registerElementProperties(type, props), api.registerGlobalElementProperties(props), api.registerElementPropertiesMap(map).

Property definition fields

Field	Purpose
label	Caption in the sidebar
type	Which editor renders it (table below)
category	Sidebar section: general, texts, dataSet, options, columns, restrictions, validators, logic, events, design
order	Position within the category
hint	Help text under the editor
choices	Options for select-style editors ({ label, value }[])
hiddenIf	Expression over sibling properties — hides the editor conditionally (e.g. !maskType || maskType.value != "custom")
applyConditions	Other property keys to re-evaluate when this one changes
section	Optional sub-grouping inside a category
component	A custom Angular editor component (fully custom editors)
loadChoices	Async choice loader (properties) => Promise<ChoiceModel[]>

Editor types

The type string picks one of the built-in attribute editors:

Type	Editor
text / textarea / number	plain inputs
checkbox	boolean toggle
select	dropdown (uses choices)
color	color picker
size	size with units (px/%/…)
padding	four-sided padding editor
options	option-list editor (label/value rows)
validators	validators rule editor
eventActions	events & actions editor
sourceMapper	data source binding editor
variantRules	conditional variant rules
columns / tableColumns	column schema editors
htmlCode	code editor
file	file picker
checklist, logic, templateName, sourceName, and others	specialised editors used by built-in elements

For anything unique, supply your own component — it receives the property and element context and writes the value back like any built-in editor.

How values reach the element

A property with key analyticsEvent is stored on the element JSON as "analyticsEvent": ... and appears on the model at runtime (model().analyticsEvent in your component, getElementProperty(name, 'analyticsEvent') from the host).

Property hints

To only clarify existing properties (no structural change), set hint texts from the host:

api.setPropertyHints({ name: 'Unique key — becomes the data field name.' });
api.setPropertyTypeHints({ sourceMapper: 'Binds this element to a data source.' });