How to prevent plugins from loading jQuery

If a plugin is written well (or the theme) than you have no reason to worry about duplicate jquery loading.

if your theme uses header.php to load jquery then your doing it wrong and should use enqueue scripts to load jQuery…

WordPress uses wp enqueue script to declare scripts once and not multiple times.

Example of loading scripts the right way:

function sg_theme_js(){

    wp_enqueue_script( 'jquery' );
    wp_enqueue_script( 'bootstrap', 'http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js', array('jquery'), 3.3, true);
    wp_enqueue_script( 'miscscripts', get_template_directory_uri().'/js/misc-scripts.js', array('jquery'), 1.0, true);

}
add_action( 'wp_enqueue_scripts', 'sg_theme_js' );

Also…
i have downloaded the plugin and found where scripts are being loaded (in testimonial_1.php) and the plugin doesnt load jquery – i guess the author assumes your theme includes jquery correctly (as it should)

SO…
i would search for the spot you include jquery in your theme and change the way to do that to the right way AKA using the wp_enqueue_script function

Related Posts:

  1. jQuery function didn’t work in my plugin
  2. Adding a slider captcha to the comment system
  3. Save user total active time after login in wordpress [closed]
  4. Custom meta box with jQuery.sortable custom post type list
  5. update_post_meta is not working for me when I use e.preventDefault for update button
  6. WordPress Thickbox Navigation Issue in Gallery
  7. Overwrite js code using WP_Footer
  8. How to get site homepage from plugin?
  9. What are the differences between WPINC and ABSPATH?
  10. Problems with autoloading classes via sp_autoload_register / maybe interfering WP-specific autoloader
  11. Using require_once in a Plugin?
  12. How to Loop Plugin Option Field Set?
  13. Custom plugin giving: wp-admin/admin-ajax.php 400 (Bad Request)
  14. Editor not displaying dynamically after clicking on the button
  15. Rename existing old uploaded images containing accented French characters (not during upload)
  16. How to Create a Directory in a Plugin Folder?
  17. Why is my ajax call refreshing the page?
  18. Create plugin that works in background
  19. Checking for user role in a custom plugin
  20. HELP: Integrating WP with raw PHP code once published button is hit
  21. Loading class files via autoload method
  22. How to create popup same as wordpress popup feature
  23. Only execute jQuery function(on document ready) on the page has shortcode from plugin [duplicate]
  24. I would like to use create a function in my custom plugin to tell WP to use a different header
  25. Getting media library popup in custom plugin admin page
  26. Sanitizing, Validating and Escaping in WordPress (Plugin)
  27. Escape when echoed
  28. Check if email address exists front end with AJAX in a plugin
  29. Plugin Development sqlite or WordPress’ database
  30. WooCommerce get_price returning wrong price when used via ajax
  31. Open Post Thumbnail in New Child Theme File in WordPress
  32. Redirecting to home page after login as custom role WordPress
  33. Add keywords meta to index.php page
  34. Pulling data from custom plugin settings using PHP shortcode and Javascript
  35. Notepad sticky plugin
  36. Error with Image Slide plug-in/ s3slider in WP
  37. What are the specifics of WordPress development I need to know? [closed]
  38. How to create a custom post type that contains another custom post type?
  39. Using color picker in plugin, does input attribute order matter?
  40. Setup wp_schedule_event within a custom plugin
  41. WordPress Jquery UI Spinner
  42. Issue running db create table query from static method
  43. execute function after one completed
  44. How to make multiple admin pages for one plugin?
  45. Adding media upload button to User Profile page (following a tutorial)
  46. Integrating boxtal PHP library into a custom WordPress Plugin
  47. Plugin not working & permalink erorr after upgrade to php 7x on Nginx
  48. Why is it important to check for isset and is_array before checking in_array in this example?
  49. How to add/change (woocommerce) product tab icon
  50. Comment “like” problem – “users who like this” avatar linking to current user profile instead of “liker’s” profile
  51. I want to generate the pdf and save it in library?
  52. How do I make sure that my plugin only runs on article detail pages?
  53. Wp Debug Enabled True Notices and Warning
  54. How to call external functions from a PHP script in a WordPress plugin?
  55. How to write to a separate PHP file in plugin settings
  56. Create “new pages” within the admin section of plugin
  57. “switchEditors is not defined” with wp_editor() in jQuery UI tabs
  58. More gentle way to hook WordPress custom url
  59. How to display results from a data table with an encrypted user id?
  60. How to add custom function to pluggable.php
  61. Ajax request sends url rather than data
  62. How to displaying Custom image, text and default image logo from Redux Framework option panel
  63. How to Call Specific .PHP file on add_submenu_page selection in Plugin Development?
  64. How to Add text value in Automatically in this conditions?
  65. Checkbox show / hide output result
  66. How do I reinit WordPress plugins dynamically using jS?
  67. save_post_product action not firing
  68. How to get the custom field value using SQL query
  69. admin_notices show after load completed
  70. How use wp_insert_post and add og:custom tags?
  71. Is there any way to sync Facebook Comments and with comments on WordPress website?
  72. Hide content for specific users with id
  73. adding dynamic/multiple slug values in ‘option_none_value’
  74. How to change “Read More” text?
  75. How can I see $post object in frontend from functions.php?
  76. Move plugin pages from dashboard to front-end
  77. main navigation menu disappear after adding jquery source file
  78. Using id to show item
  79. 500 Internal server error wp_handle_upload_prefilter
  80. Can’t access 3rd party API, code works on local server but not on wordpress
  81. Generate and send ICS file through WordPress
  82. Get post content inside plugin class method
  83. Dynamic input fields in WordPress Plugin
  84. Is admin section completely customizable in terms of styling?
  85. Storing Array of values into wordpress options
  86. WordPress not displaying information on post sent from custom admin form
  87. How to limit each front-end user to view just his own uploaded files on Amazon S3?
  88. Creating a user ‘add custom field’ section
  89. WordPress ajax not working in registration
  90. AJAX doesn’t pass variables to the php function in the plugin
  91. Saving plugin data returns “You do not have sufficient permissions to access this page.”
  92. How to add a handler for a button in plugin?
  93. Doing action based on input from options menu
  94. Load my plugin before cache
  95. My wordpress website admin panel loads very slow, what can i do about that? [closed]
  96. wordpress select multiple options and illegal string offset ‘timeslot’ [closed]
  97. Jquery post responses 500 error after some time and lastly an 503 error
  98. wp_handle_upload – specified file failed upload test
  99. How to make a Template page to show the information of different things Shop and Product page?
  100. public custom posts not showing in my wordpress plugin