Problem using is_single() to enqueue script from functions.php

This could be one of a few different issues.

1. Wrong Hook / Not Hooked

You need to make sure that wp_enqueue_script is hooked to wp_enqueue_scripts. Otherwise, the call can get fired too late or (possibly in this case?) too early?

Try this (also with your php cleaned up a bit:

function wpse53364() {
    if( !is_admin() && is_single() ) {
        wp_register_script( 'jquery-scroll', get_bloginfo('stylesheet_directory').'/libs/jquery.jscrollpane.min.js' );
        wp_enqueue_script( 'jquery-scroll' );
    }
}
add_action( 'wp_enqueue_scripts', 'wpse53364' );

2. Incorrect Template Use

It’s unclear from your question, but if you’re using single.php for your “custom single posts template,” you shouldn’t be using that “Template Name:…” header. The WordPress template hierarchy will automatically know which file to use.

3. Wrong Conditional Tag

The fact that you’re using a custom page template makes me wonder whether you’re trying to use this script to enqueue the script on PAGES as opposed to POSTS. If that’s the case, you need to replace is_single() with is_page() or is_singular( 'page' )

Related Posts:

  1. deregister scripts on certain page
  2. Enqueue scripts not working with if is page conditional tag in functions.php
  3. wp_enqueue_scripts called twice?
  4. How to load scripts/styles specific for a page
  5. WordPress Enqueue for homepage only, functions.php, wp-framework
  6. WordPress function like is_category for subcategory? is_subcategory?
  7. Enqueue Script with data attributes
  8. disable comments if array exists
  9. Most elegant way to enqueue scripts in function.php with foreach loop
  10. Conditional tag is_page with a custom post type
  11. Dequeue Scripts and Style for Mobile not working?
  12. Enqueuing External Javascript functions.php
  13. How to enqueue JavaScript for specific WordPress pages only?
  14. Enqueue script o style only if a template part is loaded
  15. Enqueuing Script in functions.php vs on the page
  16. Dequeue script in template isn’t working
  17. Limit posts only on home page – ideally in functions.php
  18. If is multiple page templates
  19. How do I get a child theme to load scripts from the parent theme?
  20. wp_enqueue_script add integrity parameter
  21. Passing arguments to my function with do_action and add_action is not working
  22. When using wp_enqueue_script(); in a theme why don’t we use add_action?
  23. Load JS Script only for custom post types
  24. wp_is_mobile dequeue not working
  25. Register vendor JS/CSS only on pages that require them?
  26. Conditional read more adjustment
  27. Not sure if enqueuing js scripts properly
  28. Only let plugin add actions to wp_head & wp_footer on single posts
  29. How add various functions within 1 conditional?
  30. enqueue styles for only mobile wp
  31. how to en-queue jQuery to load before the tag
  32. Conditional Gravity Forms filter in WordPress Multisite
  33. jQuery does not work
  34. enqueue_script with filemtime javascript not working
  35. add_action wp_enqueue_script priority level only works for admins
  36. Scripts not loading when using the wp_enqueue_scripts action
  37. Why does get_template_directory_uri() not include “www”, only for enqueued stylesheets?
  38. In jquery use php variable to execute an enqueued jquery file
  39. Testing for a shortcode using a function. 404 page throwing PHP Notice
  40. is_page() or is_single not working
  41. Enqueue script on every page except one
  42. functions.php and conditional tags
  43. Run a jquery script on on a certain template page
  44. How to: Conditionally Enqueue JS and Stylesheets, for Custom Post Type (Single and Archive Templates)
  45. issue with if/elseif in_array inside foreach loop display only one post
  46. wp_enqueue_script | Help me figure out what is causing jQuery is not defined
  47. Load JS file only in specific template
  48. Theme JS is available but theme CSS isn’t
  49. 404 when enqueue_script using plugin_url
  50. How to load jQuery in TOP of wp_footer?
  51. video.js not enqueueing?
  52. Include Jquery libraries in wordpress theme?
  53. Problem enqueuing scripts on not single posts
  54. Call two different function.js depending on page
  55. Why I can’t load my JavaScripts using an hook inside my functions.php file?
  56. Function to echo (or display?) wordpress tags in the head section
  57. is_home() not working in functions.php file
  58. If is_single in functions.php
  59. Enqueueing scripts selectively & activation where needed
  60. Fatal error: allowed memory size when after using enqueue_script
  61. How to use wp_enqueue_script properly?
  62. Get webpack to work on child theme
  63. Advanced method to control cache of enqueued style/script
  64. How to load a css file depending on the current role
  65. WordPress wp_dequeue_script remove all other scripts
  66. Add custom css file after plugin css with WordPress Child Theme functions.php
  67. Is it possible to load recaptcha script only in url with fragment identifier (#)?
  68. Enqueue script if not page template
  69. Test CDN link from function.php or wp_enqueue_script/style?
  70. is_product_category(‘Services’) not working
  71. Why does my wp_enqueue_script() only insert the script for logged in users
  72. Unable to declare AOS library in functions
  73. WP Enqueue Script Error
  74. How do I dequeue a Stylesheet, stored in an ‘Assets’ folder?
  75. method to fetch entire tag list on archive.php
  76. I need to ‘wp_dequeue_script’ and ‘styles’ and ADD a bunch of other css and js
  77. I need to completely ‘wp_dequeue_script’; what’s the best way?
  78. True parameter but jquery register in header and not in the footer with wp_register_script
  79. Why is style.css not loading through the functions.php
  80. Adding an IF ELSE to a function
  81. WordPress Jquery+scripts enqueue issue
  82. Different body image backgrounds on different pages, posts and categories
  83. How to wp_enqueue_script with html?
  84. custom post with loading script per single post
  85. wp_enqueue_script only works outside of action
  86. Load CSS conditional on custom field is present
  87. java script error Uncaught SyntaxError: Unexpected token ILLEGAL
  88. admin-ajax.php nulls all php variables
  89. restrict access to specific urls on a specific period of time
  90. Change conditional tag in wordpress without editing the core files
  91. using enqueue_script in a shortcode isn’t working
  92. Using array page name together with page id to deregister script
  93. Remove snippets of JS from core
  94. Why my wp_enqueue_script doesnt work on some page?
  95. PHP Notice: Function is_page was called incorrectly. Conditional query tags do not work before the query is run. Before then, they always return false
  96. WordPress – Notice: Function wp_enqueue_script was called incorrectly
  97. dynamically import array from another js file in WordPress
  98. Auto updating JavaScript dependancy in functions.php
  99. Loading newest dependency javascript module file in functions.php
  100. wp_script_add_data not working

Leave a Comment