Can the wp-plugins (Must Use Plugins) URL be targeted for use in functions.php?

EDIT: this solution is not a best-practice. Please use the solution submitted by Nathan below!

Use the WPMU_PLUGIN_DIR and WPMU_PLUGIN_URL constants 🙂

function load_my_alerts(){
    wp_register_script( 
        'my_alerts', 
        WPMU_PLUGIN_URL . '/js/alerts.js', 
        array( 'jquery' )
    );
    wp_enqueue_script( 'my_alerts' );
}
add_action('admin_enqueue_scripts', 'load_my_alerts');

Related Posts:

  1. Remove Actions/Filters added via Anonymous Functions
  2. Programatically add options to “add new” custom field dropdown
  3. Excluding iPad from wp_is_mobile
  4. How to add classes to images based on their categories?
  5. How can I add an extra WooCommerce hook
  6. Wrap gutenberg block ‘div’ in other elements/extra HTML
  7. display public excerpt for private post
  8. automatically adding submenu items
  9. Functions.php: If its single?
  10. Remove Menu Page Giving Error
  11. How to add another user to this remove_menu function?
  12. Dequeue script in template isn’t working
  13. How do I call wp_mail from HTML?
  14. wp_link_pages: display current page number only if has multiple page breaks?
  15. RSS Feed has no styles in chrome – function to add one?
  16. Adjust which tempalte a page uses with a function?
  17. How to change menu icon which is overriden (i.e. by WooCommerce) [closed]
  18. WordPress Content Security Policy and Subresource Integrity
  19. Display trackbacks separately from comments in twentyeleven
  20. modify a function filter
  21. Accepted arguments value in hook functions
  22. Best practices for multiple Custom Feeds functions
  23. Print Post Parent Title
  24. Which action hook to use for function?
  25. How to automatically remove links from WordPress Biographical Info?
  26. Selective Product Category for Carousel
  27. How to change login labels
  28. Get the link for RSS item to display in feed
  29. Shortcode pagination not advancing
  30. Commenter should see only his comments in wordpress
  31. translate the_title() with .po & .mo
  32. Right way to update widget on dynamic new input field
  33. custom rss templete
  34. How can i disable auto save & revisions with `function.php` in wordpress?
  35. Move ‘current-menu-item’ class on #adminmenu li from Posts to Pages for Taxonomy Edit Screen
  36. Insert image in WordPress with HTML5 tag and caption function
  37. How to construct function for applying filter?
  38. WordPress on AWS Auto scaling and ELB giving 503
  39. WordPress PHP Conflicting User Sessions
  40. is_author(get_current_user_id()) returns false when author id and user id match
  41. How to use selected WordPress functions?
  42. Change slug shortlink “/?p=” base in WordPress
  43. Exclude category from shortcode
  44. unnecessary request call for js and css after calling wp_dequeue_script
  45. Custom HTML markup
  46. Functions Error: Impacting Galleries
  47. How to use author meta in shortcode?
  48. How to cut off question mark in url with functions.php
  49. Undefined variable error in new function
  50. How to rewrite wordpress search to work on specific category
  51. Theme JS is available but theme CSS isn’t
  52. Genesis Framework: How to exclude a specific author from archive custom loop
  53. How to Add Shortcode to html img code?
  54. Logout Redirect and also WP-login.php Redirect
  55. Proper Way to Load stylesheet on Condition
  56. Passing Jquery value to WordPress function
  57. How to pass variables from one function to another or combine functions
  58. How to create a shortcode out of a php function
  59. Is it possible to use add_filter in an included file in the child theme’s functions.php?
  60. Insert Content Before div#main from the functions.php File
  61. Insert function insde body tag
  62. Unable to add extra elements to the main navi (wp_nav_menu_items)
  63. Internet Explorer opens links to .msi files as text in a new tab
  64. call wp_insert_user in custom class doesnt work
  65. I would like single.php to act just like index.php
  66. Does WordPress has an automatic link parse function?
  67. A better way to get stats
  68. Conditional custom menu?
  69. What function actually renders the wp_admin_bar ? How can I call it?
  70. Get URLs for AJAX Filter Checkboxes WordPress
  71. redirecting a URL if accessed directly
  72. Detect Ajax call inside pre_get_posts function
  73. Render page with specific id from functions.php
  74. What is wp_get_post_tags for media tags?
  75. Filter works on last selection but no others
  76. How do I trigger WP CLI DB export using a PHP function?
  77. WordPress does not load jQuery
  78. get_current_user_id() always return 0 in if else statement
  79. Redirect specific author posts to another url
  80. Show number of sold products but be first for less than 2
  81. How to retrieve image IDs from shortcode content?
  82. I need to ‘wp_dequeue_script’ and ‘styles’ and ADD a bunch of other css and js
  83. True email confirmation for registration (keeping unvalidated users from user table)
  84. Class::$template_dir_path=get_template_directory();
  85. admin-ajax.php & my wp-admin folder url showing in header
  86. WordPress – Custom Nav menu for logged in users – Shopkeeper theme
  87. Change post count on tag/terms pages to 10
  88. How to use if (is_page_template (”))
  89. wordpress function through ajax not being called
  90. Error function main() is a non-object to construct my Ajax.php
  91. Automatically add custom fields (post_meta) to all published posts, hourly, via wp_cron?
  92. How to mirror exactly the left admin menu on front end?
  93. Gravity Forms After Submission – GFFormsModel::update_lead_field_value?
  94. Fatal error after changes to functions.php, even with original file
  95. update_post_meta after form is submited
  96. Make a table out of meta box
  97. Should I use `get_stylesheet_uri()` or `get_template_directory_uri()` when calling my CSS Stylesheet?
  98. Missing argument 2
  99. Customizer cuistom CSS Priority ordre Issue
  100. WPDB query suddenly not working

Leave a Comment