WordPress HTML5 Gallery Support – Convert HTML4 -> HTML5

Try this:

add_theme_support( 'html5', array( 'gallery', 'caption' ) );

And don’t forget to declare the HTML5 DOCTYPE at the very beginning of header.php with:

<!DOCTYPE html>

Related Posts:

  1. How to add CSS class to custom logo?
  2. Editing the custom background CSS
  3. How to add default images for custom backgrounds?
  4. Add colors to existing color palette without replacing it
  5. What flex-width/height does?
  6. How do I get gallery thumbnail URL and change the default thumbnail size?
  7. add_theme_support(‘my-custom-feature’)
  8. add_theme_support( ‘custom-header’ ) does not add option menu in dashboard
  9. Remove frameborder attribute from iframes
  10. how to change WordPress menu markup/classes
  11. WordPress Genesis Child Theme Filter divs
  12. How do I attach images to a post without inserting them?
  13. Integrating Html5Boilerplate’s Builder into a WP Theme
  14. Is there a filter for enqueue script to strip the type=”text/javascript” property
  15. using jQuery Cycle by Malsup with WordPress Page and Gallery
  16. “add_theme_support” for custom footer color?
  17. Show video as part of the post?
  18. How to add theme support?
  19. How to provide support for [gallery] shortcode?
  20. attachment.php code or tutorial
  21. Edit footer via customizer
  22. Theme Development: Starter Content after hook
  23. Bootstrap card columns change images size
  24. Can I add multiple arrays within add_theme_support( ‘colors’ )?
  25. How to add custom meta box under Gallery Settings in the “Edit Gallery” popup
  26. How to use add_theme_support(‘html5’)?
  27. Gallery thumbnails very small
  28. Theme support title tag – how to replace the default WP separator (with a filter)?
  29. How to show a manageable list of images on a post?
  30. Adding a gallery to my first theme
  31. add_theme_support( ‘admin-bar’ ) causes fatal error
  32. In a Gallery with limited image posts, how do I not limit images on single post?
  33. Gallery functionality in custom theme
  34. What is difference between add_theme_support and Theme Customization API?
  35. New theme HTML5 Support for Search in WordPress 4.4
  36. Replaceing _custom_background_cb
  37. Is it possible to customize the layout of Gallery Shortcode?
  38. How can I add a single image from a gallery into the page header?
  39. Theme’s featured image option is not showing up
  40. Theme Activate Hook
  41. Can I create my own “Recent Posts” widget or customize the existing one?
  42. Do I actually need to link my theme’s style.css in the theme files
  43. Customize WordPress>Error Page
  44. How to remove the Theme Customization Button from the dashboard and themes options page?
  45. How to make native video player full width?
  46. get_template_directory_uri() in child theme pointing at child theme
  47. What are the ADVANTAGES of ORIGINAL wordpress template structure?
  48. How to remove “prev, next, shortlink” from wp_head()?
  49. Theme file for all pages that are a child of a specific page
  50. Different ways to display title
  51. How to add a 2nd “featured image” to a post?
  52. What is the difference between WP: template_directory vs TEMPLATEPATH
  53. Strategy to get post meta for use outside the loop
  54. Authentication / login mechanism (non wp-admin)
  55. How to display wp_nav_menu() conditionally only when not on a 404 page?
  56. Suggestions for creative use of post format feature, or themes that use them well
  57. Retrieve the template directory URI via global or get_template_directory_uri() every time?
  58. How to add a section to the menus configuration, offering hard coded items?
  59. Add a #hash to the links in my custom menu
  60. Subdirectory install error
  61. How can i change menu link when page content empty?
  62. How can I remove specific custom post meta from the “Custom Fields” fieldset?
  63. How to load different CSS in different Header?
  64. How can I add an incremental class identifier to my sidebar widgets?
  65. How to preset a sidebar widget with default content via script?
  66. add_theme_support using a plugin
  67. Am I using get_posts wrong?
  68. Featured Image Size
  69. the_tags without hyperlinks?
  70. How to keep theme layout the same when admin gray bar is present?
  71. Writing Clean WooCommerce Styles
  72. Wrong path for theme assets
  73. one time popup after theme activation
  74. Create a theme by combining a parent and a child theme
  75. Custom header images won’t appear when set to random
  76. Modify Javascript Configuration Options for Theme Customizer Colour Picker
  77. retrofiting old blog
  78. WordPress default theme css units
  79. how do you create an admin interface in plugin for your theme
  80. Override parent theme’s include file from child theme
  81. Implement advanced search
  82. WordPress add options to theme not displaying
  83. What is the right way to set up a one-page portfolio theme? [closed]
  84. Where should I update_options in a theme?
  85. Is it possible to edit the styling of the admin panel from within a custom theme?
  86. When trying to override plugin’s function by theme, my filter executes two times, I want it to run only a single time
  87. Highest number of WordPress Custom Page Templates?
  88. Difficulty loading jQuery with wp_enqueue_script
  89. Users table association with users_metadata table appears broken
  90. Can’t login unless twentyfifteen theme is active
  91. multisite: global menu containing network site links?
  92. Injecting a custom sql query into a page/theme
  93. the_excerpt(); tag not working
  94. Unable to check if image uploaded by wp_image_editor exists using file_exists function
  95. Storing the contents from txt file into The_Contents”
  96. How do you replace content generated by custom fields with custom blocks in Block Editor?
  97. How to add styles set by user in the customizer
  98. Use second time navigation.js in underscores [closed]
  99. Issue with loading mobile specific custom single page layout in mobile
  100. Why does has_nav_menu return false when get_registered_nav_menus shows the opposite?