It’s called a flash of unstyled content (FOUC, also flash of unstyled text or FOUT) which is an instance where a web page appears briefly with the browser’s default styles prior to loading an external CSS stylesheet, due to the web browser engine rendering the page before all information is retrieved.
It could be caused by many things. bad scripting, server delay, bad coding, etc.
You could check out a site speed test (google “pingdom site test”) and it MAY give you a clue.
Related Posts:
- How to move parent li to end of child ul
- How do i style the current menu anchor link’s parent anchor link? [closed]
- How to insert custom code into wp_nav_menu structure?
- Grey out nav buttons unless is_user_logged_in()
- Static page to one page- menu inactive items highlighted
- How Do I Add Images To Main Navigation Menu
- display menu as table layout
- Menu Arrow for Child Element
- How to buid wordpress menu with auto width sub-menu items in dropdown menu without any items sharing one line [closed]
- How to add css to single navigation text? [closed]
- Odd spacing in Navigation Bar [closed]
- wp_nav_menu container style args
- Add/remove image from navigation bar
- Additional CSS for the nav menu
- Disable Top Nav Bar on Mobile
- Active page link not getting class assigned
- individual images as navigation design TwentyTen
- How to add or remove borders in navigation menu?
- Programmatically add a Navigation menu and menu items
- Dynamically exclude menu items from wp_nav_menu
- Split up wp_nav_menu with custom walker
- Is there an easy way to replace a custom menu link with a page or post?
- How to Add to Each Menu Link with link text to data-attr?
- Add Javascript to WordPress Menu
- Filter wp_nav_menu()
- How to modify navigation menu of the “My Account” page in WooCommerce
- Custom ID for certain menu item?
- Add data-icon input to WordPress custom menu links
- Show just one level of child pages, wp_list_pages woe
- Removing link ” from ” menu for some “links” without JS
- Show current navigation path from menu
- Call custom field into menu item
- Use navigation path from menu for permalink
- Exclude Private, Draft pages from Primary Nav when using custom menu
- add span class inside wp_nav_menu link anchor tag
- wp_nav_menu always falls back to a menu
- wp_get_nav_menu_items how to exclude sub level menu items?
- Multi Level Bootstrap Navigation Menu in WordPress
- How to set limit only on top levels of wp_nav_menu?
- Determine if a navigation item has children
- Bootstrap dropdown nav pills not working with wp_nav_menu()
- Show only 2nd level of navigation depending on active navigation
- How to get a different mobile menu than desktop menu in the twentytwelve child theme
- Add custom attributes to menu items without plugin
- Add Page ID class to nav menu items
- How to apply a class to the second word in menu list item?
- How to highlight the right item in the navbar
- HTML Bootstrap navigation menu to WordPress menu using wp_nav_menu
- How to manually add an item to a submenu in a menu generated by wp_nav_menu?
- WordPress Export Import Site Navigation Menu
- Using Image Links in WordPress Navigation Menus Instead Of Text Links
- Links open only on new tab or window
- Not able to get current menu ID
- Bar separated navigation by extending Walker_Nav_Menu
- Add class to active top level (grandparent) menu item
- Override custom menu widget
- Bar separated navigation by extending Walker_Page
- Disguise Multi-Page site as Single Page
- Replace menu tag with tag
- Styling child custom menu pages
- How to Create a Custom WordPress Navigation Menu with the Code?
- Custom Nav Walker sub-menu HTML construct
- How to get Menu Navigation Labels to output HTML
- custom menu not found
- How to style current page menu item when using a walker
- Adding different classes to anchor in navigation menu
- Number of items in a menu
- wp_nav_menu doesn’t generate parent/ancestor classes
- When at / ( or “home”) my menu doesn’t get a current-menu-item class
- Add Bootstrap dropdown class to a nav menu
- How to add text before WordPress menu item href
- how to automatically generate hierarchical menus from hierarchy of pages?
- Search box as a menu item in the nav menu output by wp_nav_menu?
- Add an extra field to the navigation menu box?
- Why is ‘nav_menu_item_args’ filter’s $item argument empty?
- How do I prevent the text overflow in menu?
- WordPress wp_nav_menu with a nav tag
- How to change Twenty Seventeen theme’s navigation bar location?
- Add class to menu ul with active child
- How can I put two menus in the same div?
- Does the menu item ID ever change?
- Add sidebars to navigation menu?
- Make compatible custom menu widget for Twitter Bootstrap
- Custom Post type menu highlighted in the archive/post
- Hide and show menu subpages
- BuddyPress – How to add logout in nav menu
- Second nav is merged with the first in mobile
- How to add a parameter to links in the nav menu?
- `start_el` depth argument in custom nav walker always evaluates to zero
- Benefits of using Nav Walker?
- WordPress – site with 2 stylesheets and more…
- Add nav menu CSS class to body
- Use walker for specific menu, or avoid use of walker
- Change where navigation bar links?
- How to display dynamic content in start_lvl function
- Programmatically set current-menu-item using wp_nav_menu
- Nav Walker current menu item not displaying
- Vertical Sidebar Menu Parent and Child not displaying correctly [closed]
- Using Shortcodes in WP-Menus in WP 3.1 (via nav_menu_objects)?
- Add custom text to menu