Widget

Widget Lifecycle Hooks Schema

Defines lifecycle callbacks for custom widgets inspired by Web Components and React.

These hooks allow widgets to perform initialization, cleanup, and respond to changes.

@see https://developer.mozilla.org/en-US/docs/Web/API/Web_components

@see https://react.dev/reference/react/Component#component-lifecycle

@example


const widget = \{

lifecycle: \{

onMount: "console.log('Widget mounted')",

onUpdate: "if (prevProps.value !== props.value) \{ updateUI() \}",

onUnmount: "cleanup()",

onValidate: "return value.length > 0 ? null : 'Required field'"

\}

\}

Source: packages/spec/src/ui/widget.zod.ts

TypeScript Usage

import { WidgetEvent, WidgetLifecycle, WidgetManifest, WidgetProperty, WidgetSource } from '@objectstack/spec/ui';
import type { WidgetEvent, WidgetLifecycle, WidgetManifest, WidgetProperty, WidgetSource } from '@objectstack/spec/ui';

// Validate data
const result = WidgetEvent.parse(data);

WidgetEvent

Properties

Property	Type	Required	Description
name	`string`	✅	Event name
label	`string`	optional	Human-readable event label
description	`string`	optional	Event description and usage
bubbles	`boolean`	✅	Whether event bubbles
cancelable	`boolean`	✅	Whether event is cancelable
payload	`Record<string, any>`	optional	Event payload schema

WidgetLifecycle

Properties

Property	Type	Required	Description
onMount	`string`	optional	Initialization code when widget mounts
onUpdate	`string`	optional	Code to run when props change
onUnmount	`string`	optional	Cleanup code when widget unmounts
onValidate	`string`	optional	Custom validation logic
onFocus	`string`	optional	Code to run on focus
onBlur	`string`	optional	Code to run on blur
onError	`string`	optional	Error handling code

WidgetManifest

Properties

Property	Type	Required	Description
name	`string`	✅	Widget identifier (snake_case)
label	`string`	✅	Widget display name
description	`string`	optional	Widget description
version	`string`	optional	Widget version (semver)
author	`string`	optional	Widget author
icon	`string`	optional	Widget icon
fieldTypes	`string[]`	optional	Supported field types
category	`Enum<'input' \| 'display' \| 'picker' \| 'editor' \| 'custom'>`	✅	Widget category
lifecycle	`Object`	optional	Lifecycle hooks
events	`Object[]`	optional	Custom events
properties	`Object[]`	optional	Configuration properties
implementation	`Object \| Object \| Object`	optional	Widget implementation source
dependencies	`Object[]`	optional	Widget dependencies
screenshots	`string[]`	optional	Screenshot URLs
documentation	`string`	optional	Documentation URL
license	`string`	optional	License (SPDX identifier)
tags	`string[]`	optional	Tags for categorization
aria	`Object`	optional	ARIA accessibility attributes
performance	`Object`	optional	Performance optimization settings

WidgetProperty

Properties

Property	Type	Required	Description
name	`string`	✅	Property name (camelCase)
label	`string`	optional	Human-readable label
type	`Enum<'string' \| 'number' \| 'boolean' \| 'array' \| 'object' \| 'function' \| 'any'>`	✅	TypeScript type
required	`boolean`	✅	Whether property is required
default	`any`	optional	Default value
description	`string`	optional	Property description
validation	`Record<string, any>`	optional	Validation rules
category	`string`	optional	Property category

WidgetSource

Union Options

This schema accepts one of the following structures:

Option 1

Type: npm

Properties

Property	Type	Required	Description
type	`string`	✅
packageName	`string`	✅	NPM package name
version	`string`	✅
exportName	`string`	optional	Named export (default: default)

Option 2

Type: remote

Properties

Property	Type	Required	Description
type	`string`	✅
url	`string`	✅	Remote entry URL (.js)
moduleName	`string`	✅	Exposed module name
scope	`string`	✅	Remote scope name

Option 3

Type: inline

Properties

Property	Type	Required	Description
type	`string`	✅
code	`string`	✅	JavaScript code body

On this page