diff --git a/demos/src/Marks/Bold/React/index.html b/demos/src/Marks/Bold/React/index.html
new file mode 100644
index 00000000..34469957
--- /dev/null
+++ b/demos/src/Marks/Bold/React/index.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module">
+      import setup from "../../../../setup/react.ts";
+      import source from "@source";
+      setup("Marks/Bold", source);
+    </script>
+  </body>
+</html>
diff --git a/demos/src/Marks/Bold/React/index.jsx b/demos/src/Marks/Bold/React/index.jsx
new file mode 100644
index 00000000..27b180f6
--- /dev/null
+++ b/demos/src/Marks/Bold/React/index.jsx
@@ -0,0 +1,50 @@
+import React from 'react'
+import { useEditor, EditorContent } from '@tiptap/react'
+import Document from '@tiptap/extension-document'
+import Paragraph from '@tiptap/extension-paragraph'
+import Text from '@tiptap/extension-text'
+import Bold from '@tiptap/extension-bold'
+
+export default () => {
+  const editor = useEditor({
+    extensions: [Document, Paragraph, Text, Bold],
+    content: `
+        <p>This isn’t bold.</p>
+        <p><strong>This is bold.</strong></p>
+        <p><b>And this.</b></p>
+        <p style="font-weight: bold">This as well.</p>
+        <p style="font-weight: bolder">Oh, and this!</p>
+        <p style="font-weight: 500">Cool, isn’t it!?</p>
+        <p style="font-weight: 999">Up to font weight 999!!!</p>
+      `,
+  })
+
+  if (!editor) {
+    return null
+  }
+
+  return (
+    <>
+      <button
+        onClick={() => editor.chain().focus().toggleBold().run()}
+        className={editor.isActive('bold') ? 'is-active' : ''}
+      >
+        toggleBold
+      </button>
+      <button
+        onClick={() => editor.chain().focus().setBold().run()}
+        disabled={editor.isActive('bold')}
+      >
+        setBold
+      </button>
+      <button
+        onClick={() => editor.chain().focus().unsetBold().run()}
+        disabled={!editor.isActive('bold')}
+      >
+        unsetBold
+      </button>
+
+      <EditorContent editor={editor} />
+    </>
+  )
+}
diff --git a/demos/src/Marks/Bold/React/index.spec.js b/demos/src/Marks/Bold/React/index.spec.js
new file mode 100644
index 00000000..21b7111f
--- /dev/null
+++ b/demos/src/Marks/Bold/React/index.spec.js
@@ -0,0 +1,81 @@
+context('/src/Marks/Bold/React/', () => {
+  before(() => {
+    cy.visit('/src/Marks/Bold/React/')
+  })
+
+  beforeEach(() => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.commands.setContent('<p>Example Text</p>')
+      cy.get('.ProseMirror').type('{selectall}')
+    })
+  })
+
+  it('should transform b tags to strong tags', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.commands.setContent('<p><b>Example Text</b></p>')
+      expect(editor.getHTML()).to.eq('<p><strong>Example Text</strong></p>')
+    })
+  })
+
+  it('sould omit b tags with normal font weight inline style', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.commands.setContent('<p><b style="font-weight: normal">Example Text</b></p>')
+      expect(editor.getHTML()).to.eq('<p>Example Text</p>')
+    })
+  })
+
+  it('should transform any tag with bold inline style to strong tags', () => {
+    cy.get('.ProseMirror').then(([{ editor }]) => {
+      editor.commands.setContent('<p><span style="font-weight: bold">Example Text</span></p>')
+      expect(editor.getHTML()).to.eq('<p><strong>Example Text</strong></p>')
+
+      editor.commands.setContent('<p><span style="font-weight: bolder">Example Text</span></p>')
+      expect(editor.getHTML()).to.eq('<p><strong>Example Text</strong></p>')
+
+      editor.commands.setContent('<p><span style="font-weight: 500">Example Text</span></p>')
+      expect(editor.getHTML()).to.eq('<p><strong>Example Text</strong></p>')
+
+      editor.commands.setContent('<p><span style="font-weight: 900">Example Text</span></p>')
+      expect(editor.getHTML()).to.eq('<p><strong>Example Text</strong></p>')
+    })
+  })
+
+  it('the button should make the selected text bold', () => {
+    cy.get('button:first').click()
+
+    cy.get('.ProseMirror').find('strong').should('contain', 'Example Text')
+  })
+
+  it('the button should toggle the selected text bold', () => {
+    cy.get('button:first').click()
+    cy.get('.ProseMirror').type('{selectall}')
+    cy.get('button:first').click()
+    cy.get('.ProseMirror strong').should('not.exist')
+  })
+
+  it('should make the selected text bold when the keyboard shortcut is pressed', () => {
+    cy.get('.ProseMirror')
+      .trigger('keydown', { modKey: true, key: 'b' })
+      .find('strong')
+      .should('contain', 'Example Text')
+  })
+
+  it('should toggle the selected text bold when the keyboard shortcut is pressed', () => {
+    cy.get('.ProseMirror')
+      .trigger('keydown', { modKey: true, key: 'b' })
+      .find('strong')
+      .should('contain', 'Example Text')
+
+    cy.get('.ProseMirror').trigger('keydown', { modKey: true, key: 'b' })
+
+    cy.get('.ProseMirror strong').should('not.exist')
+  })
+
+  it('should make a bold text from the default markdown shortcut', () => {
+    cy.get('.ProseMirror').type('**Bold**').find('strong').should('contain', 'Bold')
+  })
+
+  it('should make a bold text from the alternative markdown shortcut', () => {
+    cy.get('.ProseMirror').type('__Bold__').find('strong').should('contain', 'Bold')
+  })
+})
