webiny-page-settings-extensions

name: webiny-page-settings-extensions context: webiny-extensions description: > Extending the Website Builder page settings with custom settings groups and modifiers. Use this skill when the developer wants to add a new tab/group to the page settings drawer (e.g., Publishing, Analytics, Access Control), or modify an existing settings group (e.g., add fields to General or SEO). Covers PageSettingsGroup, PageSettingsGroupModifier, and the doc.extensions data model. For field types, renderers, and layout details, see the webiny-form-model skill.

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:

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:

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