diff --git a/demo/scripts/slides.js b/demo/scripts/slides.js
index f8b8fb2..39af790 100644
--- a/demo/scripts/slides.js
+++ b/demo/scripts/slides.js
@@ -10,13 +10,15 @@ console.log('Reveal version', Reveal.VERSION);
 console.log('Reveal instance', Reveal);
 
 // One method per module
-function schoolSlides() {
+function schoolSlides(showType) {
     const dir = '01-classics';
     return [
         '00_intro.md',
         `${dir}/10_chapter1.md`,
         `${dir}/20_transitions.md`,
-        `${dir}/30_code_slides.md`,
+        !showType || showType === 'custom'
+            ? undefined
+            : `${dir}/30_code_slides.md`,
         `${dir}/40_custom_bg_slides.md`,
     ];
 }
@@ -53,17 +55,19 @@ function toolsSlides() {
     ];
 }
 
-function formation() {
+function formation(showType) {
     return [
         //
         ...schoolSlides(),
-        ...speakerSlides(),
-        ...layoutsSlides(),
-        ...helpersSlides(),
-        ...toolsSlides(),
-    ].map((slidePath) => {
-        return { path: slidePath };
-    });
+        ...(!showType || showType === 'speakers' ? speakerSlides() : []),
+        ...(!showType || showType === 'layouts' ? layoutsSlides() : []),
+        ...(!showType || showType === 'helpers' ? helpersSlides() : []),
+        ...(!showType || showType === 'tools' ? toolsSlides() : []),
+    ]
+        .filter((element) => element !== undefined)
+        .map((slidePath) => {
+            return { path: slidePath };
+        });
 }
 
 await ThemeInitializer.init({
diff --git a/src/addons/tc-data-type.spec.ts b/src/addons/tc-data-type.spec.ts
index 84c1a72..f4f781f 100644
--- a/src/addons/tc-data-type.spec.ts
+++ b/src/addons/tc-data-type.spec.ts
@@ -1,9 +1,23 @@
 /**
  * @vitest-environment jsdom
  */
-import { beforeEach, describe, expect, it } from 'vitest';
+import { afterAll, beforeEach, describe, expect, it } from 'vitest';
+import { getShowType, manageShowTypeContent } from './tc-data-type';
+import { DEFAULT_TYPE } from '../utils/const';
 
-import { manageShowTypeContent } from './tc-data-type';
+// Mock window.location
+const mockLocation = {
+    search: '',
+    href: '',
+    origin: 'http://localhost',
+    pathname: '/',
+    hash: '',
+};
+
+Object.defineProperty(window, 'location', {
+    value: mockLocation,
+    writable: true,
+});
 
 const HTML = `
 <div class="reveal">
@@ -30,6 +44,34 @@ const HTML = `
 </div>
 `;
 
+describe(getShowType.name, () => {
+    afterAll(async () => {
+        window.location.search = '';
+    });
+    it('should use default type if nothing is specified', () => {
+        document.body.innerHTML = `<div class="reveal">
+            <div class="slides"></div>
+        </div>`;
+        const type = getShowType();
+        expect(type).toBe(DEFAULT_TYPE);
+    });
+    it('should use type if specified in HTML', () => {
+        document.body.innerHTML = `<div class="reveal">
+            <div class="slides" data-type="test"></div>
+        </div>`;
+        const type = getShowType();
+        expect(type).toBe('test');
+    });
+
+    it('should use type if specified in URL', () => {
+        window.location.search = 'data-type=test2';
+        document.body.innerHTML = `<div class="reveal">
+            <div class="slides"></div>
+        </div>`;
+        const type = getShowType();
+        expect(type).toBe('test2');
+    });
+});
 describe(manageShowTypeContent.name, () => {
     beforeEach(async () => {
         document.body.innerHTML = HTML;
diff --git a/src/addons/tc-data-type.ts b/src/addons/tc-data-type.ts
index d2e1df7..2bd0386 100644
--- a/src/addons/tc-data-type.ts
+++ b/src/addons/tc-data-type.ts
@@ -1,21 +1,27 @@
 import { DEFAULT_TYPE } from '../utils/const';
 import { _handle_parameter } from '../utils/helper';
 
-export function manageShowTypeContent(
-    defaultType: string = DEFAULT_TYPE
-): void {
+export function getShowType(defaultType: string = DEFAULT_TYPE): string {
     const urlParams = new URLSearchParams(window.location.search);
     const slidesElement: HTMLElement =
         document.querySelector('.reveal .slides')!;
-    const slidesType = _handle_parameter(
+    return _handle_parameter(
         urlParams,
         'data-type',
         slidesElement,
         'data-type',
         defaultType
     );
+}
+
+export function manageShowTypeContent(
+    defaultType: string = DEFAULT_TYPE
+): void {
+    const slidesType = getShowType(defaultType);
 
     if (slidesType !== 'all') {
+        const slidesElement: HTMLElement =
+            document.querySelector('.reveal .slides')!;
         Array.from(slidesElement.querySelectorAll('section[data-type-show]'))
             .filter(
                 (el) =>
diff --git a/src/theme-initializer.spec.ts b/src/theme-initializer.spec.ts
index 05460e8..8abec52 100644
--- a/src/theme-initializer.spec.ts
+++ b/src/theme-initializer.spec.ts
@@ -2,10 +2,10 @@
  * @vitest-environment jsdom
  */
 import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { DEFAULT_TYPE } from './utils/const';
 import Reveal from 'reveal.js';
 import { ThemeInitializer } from './theme-initializer';
 import { render } from 'lit-html';
-
 // Mocks
 vi.mock('reveal.js', () => ({
     default: {
@@ -56,6 +56,10 @@ vi.mock('./utils/storage-service', () => ({
         ]),
 }));
 
+vi.mock('./addons/tc-data-type', () => ({
+    getShowType: vi.fn().mockImplementation(() => DEFAULT_TYPE),
+}));
+
 vi.mock('./addons/tc-ui-config');
 
 // Get a representation of this mock class
diff --git a/src/theme-initializer.ts b/src/theme-initializer.ts
index 4221563..99356fb 100644
--- a/src/theme-initializer.ts
+++ b/src/theme-initializer.ts
@@ -16,13 +16,14 @@ import { SlidePath } from './models';
 import { TcCustomBackgroundOptions } from './addons/tc-custom-background';
 import { TcThemeOptions } from './addons/tc-theme';
 import { TcUiConfig } from './addons/tc-ui-config';
+import { getShowType } from './addons/tc-data-type';
 import { getSlidesToUse } from './utils/storage-service';
 
 /**
  *
  */
 export interface ThemeInitializerOptions {
-    slidesFactory: () => SlidePath[]; // Function to retrieve the slides informations
+    slidesFactory: (showType?: string) => SlidePath[]; // Function to retrieve the slides informations
     activeCopyClipboard?: boolean; // Default applied is true
     tcMarkedOptions: TalkControlMarkedOptions; // Deal with the font icons
     tcI18nOptions: TcI18nConfig; // Deal with the i18n options
@@ -50,8 +51,11 @@ export const ThemeInitializer = {
             document.querySelector('.slides');
         if (importSlideElement == null) return;
 
+        // Retrieve the data type parameter to apply to a subset of slides
+        const showType = getShowType(defaultSlidesType);
+
         // Retrieve the slide path list
-        const slides = slidesFactory();
+        const slides = slidesFactory(showType);
 
         // Init the uiConfig
         new TcUiConfig(