wp.domReady( () => {
  wp.blocks.registerBlockStyle(
    'core/heading', {
      name: 'tabbed-heading',
      label: 'Tabbed Heading',
    }
  )

  wp.blocks.registerBlockStyle(
    'core/post-title', {
      name: 'tabbed-heading',
      label: 'Tabbed Heading',
    }
  )

  wp.blocks.registerBlockStyle(
    'core/heading', {
      name: 'markdown-heading',
      label: 'Markdown-style Heading',
    }
  )

  wp.blocks.registerBlockStyle(
    'core/post-title', {
      name: 'markdown-heading',
      label: 'Markdown-style Heading',
    }
  )
} )