Conditionally Load a Script if a Certain Widget is Shown on a Page

I think what you are asking to do is not possible. At least not cleanly. Why?

Because the actual rendering of sidebars and widgets happens in the template files. get_sidebar() gets called from a template file which then calls the WP_Widget::widget() method for whichever widgets are assigned to the sidebar in question. But this happens after the wp_head event is called (usually from the header.php template) and scripts queued for the head are printed. So you can’t know whether your widget will be actually be loaded by a given theme’s templates for the page body on any given page until after the <head> has already been sent.

The most you can know is that if a theme template calls a sidebar in which the widget is active, it will be printed to the page output — which is what is_active_widget() tells you.

Related Posts:

  1. How Can I Add the “Insert From URL” Tab to a Custom 3.5 Media Uploader?
  2. Where is the content of widgets stored in mysql table
  3. How to refresh Theme Customizer after change color inside wpColorPicker?
  4. How do I rebind event after widget save
  5. Determining a Widget Instance and Sidebar Location?
  6. Randomize widgets displayed in my sidebar [duplicate]
  7. Calling static method in the Widget Class
  8. Remove […] from RSS feed?
  9. Difference between widget form code variables
  10. How to create a widget that has a submit form in the front end
  11. Modifying recent post widget to include icons for post titles
  12. Unfiltered html in widget title not working
  13. How to process content in a widget? [duplicate]
  14. How Can I Register Menus and Widgets Conditionally Based on Theme Options/Settings?
  15. How do I embed in a text widget?
  16. check for shortcode in post/pages AND widgets AND template files
  17. Why can’t I add this feed to the RSS widget?
  18. Why use dynamic_sidebar() conditionally?
  19. WordPress Widget multiple use
  20. Contact Form in sidebar [closed]
  21. Using Advanced Custom Fields in a widget
  22. Closest thing to an is_widget() tag?
  23. More flexible sidebar and widget management
  24. Dynamic Sidebars On Multiple Subpages
  25. Can I remove a widget area without editing code?
  26. Need some help understanding widgets
  27. Cannot save widgets in custom sidebars
  28. Disable widgets on specific posts
  29. register widget class not written in theme
  30. Font awesome Icon HTML in widgets disappear on save
  31. How to determine the number of widgets contained in a sidebar via customizer JS
  32. Hide widget if user is logged in without plugin
  33. Toggle option in sidebar widgets
  34. Add field to dashboard to update embedded URL on homepage?
  35. How can hide widget title if custom widget is empty
  36. styling back end widget form and enabling multi widget feature
  37. How to show different widgets on different pages in a user friendly way
  38. widgetlogic and permalinks
  39. allow user to style widget backgound per widget
  40. I’m trying to find a basic plugin for displaying images in a widget [closed]
  41. A form in a custom widget
  42. Elementor widgets – conditional controls
  43. Widgets in home.php redirect to index.php
  44. How to track whether the user has changed the value of the field in the widget or not?
  45. Problem creating an array instance in a widget in 4.4 update
  46. Redirect to page after a widget form submit
  47. WordPress: How to embed a widget on a separate website?
  48. Widget on the right side of the page overlaps with the left side [closed]
  49. Where to put custom widget file?
  50. Making tags appear as an Unordered list instead of a ‘cloud’
  51. Shortcode not working in widget
  52. How to pass a special CSS class into widget li
  53. Show Woocommerce Product “attributes/extra information tab” in widget [closed]
  54. How to use the widget area to extend the page content?
  55. wordpress widget missing jquery
  56. Display a widget on a specific type of archive
  57. Add a specific css to a widget
  58. Widget Title is not saving in backend
  59. Add class to on sidebar widget
  60. Save button is not working on custom widget
  61. WordPress update not saving
  62. WordPress Edit Button not appearing for widget in customizer
  63. WordPress database error – quick review
  64. Select two value from meta key and post meta
  65. Add drop down to widget if it is in a certain area
  66. using get_template_part() inside a widget and passing variables
  67. How to add a text widget on the posts admin page?
  68. Widget select option not saving
  69. How do I exclude portrait pictures from the nextgen gallery sidebar widget?
  70. Add html after the first widget in a sidebar
  71. How to use multiple instances of Deal or Announcement With Countdown Timer Plugin Widget
  72. Changing the order of widgets according to current page?
  73. Your theme has 8 widget areas, but this particular page doesn’t display them
  74. A message to clients in the dashboard widget received from another site
  75. How to get individual values from custom widget?
  76. How would you return a value from an individual field in a custom widget?
  77. Can view Social Media buttons only in the private mode – why?
  78. Before_widget won’t show up
  79. Widget Registration Problem
  80. Reload widget with AJAX
  81. Function for widget titles
  82. Widget outputting JS as plain text
  83. How do you add a widget to the side of a page
  84. Prevent widgets from disappearing when swtiching from parent to child theme
  85. Is it good practice to change certain page appearance through a widget?
  86. Widget settings disappear after refreshing page
  87. How to check widget-cpt meta and display its custom css in the head?
  88. How to add WooCommerce Add to Cart button in widget?
  89. How to call theme default widget in custom template?
  90. How to place a widget beside a div/text so that they display as a continuous line
  91. How can I build a widget area widget using the built in WordPress functionalities?
  92. Widget Logic code for different PMP membership levels
  93. How to Activate WordPress Widgets
  94. How to display a widget available for all themes
  95. How to output built-in widgets with number in range as class?
  96. widgets in contacts only
  97. How to create a widget on witch a registered user can create a checklist
  98. Extending Widgets – Exclude # of posts field from Recent Posts Widget
  99. How can I create my own widgets in WordPress? [closed]
  100. getBlockVariations(…) is undefined in Widget and Template Part editors but not Post Editor