Page Settings Extensions

TL;DR

Page settings extensions let you add new tabs to the page settings drawer or inject fields into existing tabs. Create a class implementing PageSettingsGroup.Interface for a new tab, or PageSettingsGroupModifier.Interface to extend an existing one. Register both via createFeature() and <RegisterFeature>. Always store custom data in doc.extensions — never write to doc.properties, which is reserved for built-in system properties.

YOU MUST include the full file path with the .tsx extension in every src prop. For example, use src={"/extensions/myPageSettings/index.tsx"}, NOT src={"/extensions/myPageSettings/index"}. Omitting the file extension will cause a build failure.

For field types, renderers, layout, validation, and all other form builder APIs, refer to the webiny-form-model skill.

Important: Where to Store Data

Use doc.extensions for all custom data. The doc.properties object holds built-in system properties (title, path, snippet, image, tags, seo, social). Writing custom fields into doc.properties risks naming collisions with future Webiny updates and can corrupt system behavior. Always namespace your data under doc.extensions.<yourGroupName>.

// CORRECT — custom data in doc.extensions
mapFromForm(formData, doc) {
    doc.extensions.mySettings = doc.extensions.mySettings ?? {};
    doc.extensions.mySettings.myField = formData.myField;
}

// WRONG — never write custom data into doc.properties
mapFromForm(formData, doc) {
    doc.properties.myField = formData.myField; // DON'T DO THIS
}

Adding a New Settings Group

A new settings group appears as its own tab in the page settings drawer. Implement PageSettingsGroup.Interface with these members:

Member	Type	Description
name	string	Unique group identifier (used as form field namespace)
label	string	Tab label shown in the UI
description	string (optional)	Description shown below the tab label
icon	{ type: "icon", name: string } (optional)	FontAwesome icon for the tab (e.g., "fas/calendar-alt")
buildForm(form)	method	Define fields and layout
mapToForm(doc)	method	Read from document to populate the form
mapFromForm(formData, doc)	method	Write form values back to the document

Complete Example: Publishing Settings Group

// extensions/myPageSettings/PublishingSettingsGroup.ts
import { PageSettingsGroup } from "webiny/admin/website-builder/page/editor";

class PublishingSettingsGroupImpl implements PageSettingsGroup.Interface {
  name = "publishing";
  label = "Publishing";
  description = "Configure publishing schedule and visibility.";
  icon = { type: "icon", name: "fas/calendar-alt" };

  buildForm(form: PageSettingsGroup.FormBuilder): void {
    form.fields(fields => ({
      publishDate: fields.datetime().withTimezone().label("Publish date"),
      unpublishDate: fields.datetime().dateOnly().label("Unpublish date"),
      visibility: fields
        .text()
        .label("Visibility")
        .options([
          { label: "Public", value: "public" },
          { label: "Private", value: "private" },
          { label: "Password Protected", value: "password" }
        ])
        .defaultValue("public"),
      featured: fields.boolean().label("Featured page")
    }));

    form.layout(layout => [
      layout.row("publishDate"),
      layout.row("unpublishDate"),
      layout.row("visibility"),
      layout.row("featured")
    ]);
  }

  mapToForm(doc: PageSettingsGroup.PageDocument): Record<string, any> {
    const publishing = doc.extensions?.publishing;
    return {
      publishDate: publishing?.publishDate ?? null,
      unpublishDate: publishing?.unpublishDate ?? null,
      visibility: publishing?.visibility ?? "public",
      featured: publishing?.featured ?? false
    };
  }

  mapFromForm(formData: Record<string, any>, doc: PageSettingsGroup.PageDocument): void {
    doc.extensions.publishing = doc.extensions.publishing ?? {};
    doc.extensions.publishing.publishDate = formData.publishDate;
    doc.extensions.publishing.unpublishDate = formData.unpublishDate;
    doc.extensions.publishing.visibility = formData.visibility;
    doc.extensions.publishing.featured = formData.featured;
  }
}

export const PublishingSettingsGroup = PageSettingsGroup.createImplementation({
  implementation: PublishingSettingsGroupImpl,
  dependencies: []
});

Modifying an Existing Settings Group

A modifier injects fields into an existing tab without subclassing it. Implement PageSettingsGroupModifier.Interface:

Member	Type	Description
group	string	Name of the target group ("general", "seo", "social", "schema")
modifyForm(form)	method	Add fields and layout entries to the existing group
mapToForm(doc)	method (optional)	Supply values for the new fields
mapFromForm(formData, doc)	method (optional)	Persist the new field values

Complete Example: Add Expiration Date to the General Tab

// extensions/myPageSettings/GeneralSettingsModifier.ts
import { PageSettingsGroupModifier } from "webiny/admin/website-builder/page/editor";

class GeneralSettingsModifierImpl implements PageSettingsGroupModifier.Interface {
  group = "general";

  modifyForm(form: PageSettingsGroupModifier.FormBuilder): void {
    form.fields(fields => ({
      expirationDate: fields.datetime().monthOnly().label("Expiration month")
    }));

    // .after("snippet") places the field after the "snippet" field in the General tab
    form.layout(layout => [layout.row("expirationDate").after("snippet")]);
  }

  mapToForm(doc: PageSettingsGroupModifier.PageDocument): Record<string, any> {
    return {
      expirationDate: doc.extensions?.expirationDate ?? null
    };
  }

  mapFromForm(formData: Record<string, any>, doc: PageSettingsGroupModifier.PageDocument): void {
    doc.extensions.expirationDate = formData.expirationDate;
  }
}

export const GeneralSettingsModifier = PageSettingsGroupModifier.createImplementation({
  implementation: GeneralSettingsModifierImpl,
  dependencies: []
});

Feature Registration

Wrap your group and/or modifier in a feature and export a React component:

// extensions/myPageSettings/index.tsx
import React from "react";
import { createFeature, RegisterFeature } from "webiny/admin";
import { PublishingSettingsGroup } from "./PublishingSettingsGroup.js";
import { GeneralSettingsModifier } from "./GeneralSettingsModifier.js";

const MyPageSettingsFeature = createFeature({
  name: "MyPageSettings",
  register(container) {
    container.register(PublishingSettingsGroup);
    container.register(GeneralSettingsModifier);
  }
});

export default () => {
  return <RegisterFeature feature={MyPageSettingsFeature} />;
};

Register in webiny.config.tsx:

<Admin.Extension src={"/extensions/myPageSettings/index.tsx"} />

Layout Positioning in Modifiers

When modifying an existing group, use .after("existingFieldName") to position your new fields relative to built-in fields. The built-in field names for each group:

• general: title, path, snippet, image, tags
• seo: title, description, metaTags, canonicalUrl, noIndex, noFollow
• social: title, description, image, metaTags
• schema: structuredSchema

The Page Document Model

The doc parameter in mapToForm / mapFromForm has three top-level namespaces:

interface IPageDocument {
    properties: { ... };   // SYSTEM — title, path, snippet, seo, social, etc.
    metadata: { ... };     // SYSTEM — document metadata
    extensions: { ... };   // YOUR DATA — use this for all custom fields
}

Reminder: doc.properties and doc.metadata are managed by the system. Always read/write your custom data via doc.extensions. Namespace it under your group name to avoid collisions with other extensions (e.g., doc.extensions.publishing, doc.extensions.analytics).

Related Skills

• webiny-form-model — Field types, renderers, layout, validation, conditional rules, computed fields, and dynamic zones