How to run ajax in WordPress Post?

I believe one of the comments should fix your issue given how you mentioned that the code works outside of WordPress, which does in fact appear to be a problem with your references to $ instead of jQuery.

Also, i have written a post on this exact topic with step by step instruction, you can see it here:
Ajax Calls in WordPress

Related Posts:

  1. Do I require the use of nonce?
  2. Real time Duplicate title check
  3. Load custom field value into div with AJAX
  4. Security – Ajax and Nonce use [closed]
  5. Jquery ajax to custom php file: returning blank data
  6. Looking for a better way to handle an ajax script that pulls in post data on click
  7. Can’t use get_results() in ajax query
  8. Problem with WordPress Ajax form
  9. Display notification only once
  10. Access/update database with jQuery
  11. How to display something in a div when the user clicks on a text in another div – no page refresh [closed]
  12. Passing jQuery value using Ajax to a page template
  13. ajax_object is not defined when ajax calls the function
  14. Why is this Ajax not working?
  15. Stumped – Ajax Response Returns 0
  16. Colorbox ajax loading of outside HTML content works perfect on localhost but not on server
  17. Use ajax from function.php
  18. Ajax return code 400
  19. doing an ajax request always outputs 0
  20. How to test nonce with AJAX – Plugin development
  21. Woocommerce add to cart quantity buttons with AJAX
  22. class click counter save number
  23. wordpress count link clicks by ip address
  24. ajax, right way to do it and make it works?
  25. Ajax load more posts with multiple tax query
  26. WordPress Sending data to Ajax with select option
  27. WordPress ajax doesn’t display object method on jQuery .change() function
  28. Ajax loaded form replaces form action with Ajax url
  29. prevent default not stopping page refresh. Passing form information to and from php with ajax in a wordpress site
  30. Ajax date_query not working past the first iteration
  31. Ajax request not sending to server and returning – wp-admin/admin-ajax.php 400
  32. Why ajax doesn’t work on certain wordpress hooks and reload the page instead?
  33. populate form fields in a loop with ajax
  34. How to add a do_action on refreshing of WP customizer?
  35. Setting value of session with Ajax not working
  36. [jQuery]Adding shortcode
  37. Display parent and child taxonomies in separate drop down select fields
  38. Plugins not working on AJAX requests
  39. How to disable controls in theme customizer?
  40. WordPress admin-ajax.php 400 bad request
  41. WordPress Ajax Call inserting data but success response false
  42. Ajax contact form return 0
  43. AJAX – Returning Two JSON Objects with One PHP Function
  44. Unset session variable on page reload / setup but exclude AJAX
  45. Add Ajax Hooks and Call from Custom Template PHP
  46. WordPress Ajax Always returning 0
  47. How to keep track of when a vote is cast?
  48. My jQuery Ajax form submit is still refreshing page?
  49. jQuery Ajax PHP function call returning [object Object]
  50. Output votes to div dynamically in wordpress
  51. Proper way to use WordPress function with AJAX PHP file
  52. Live search from database table
  53. Execute Jquery when a specific page in my plugin is loading
  54. what does $options = get_option(‘test_theme’); do?
  55. How to load previous or next attachment with jquery ?
  56. Validating an email input from form field before submit using JQuery, AJAX, and PHP
  57. Why does PHP called with Jquery AJAX not allow additional php code to be added?
  58. WordPress cascading dropdown selection search based on Parent Page & Child Page
  59. Ajax on the Administration Side of plugin – wp_localize_script – how to pass value from JQuery to PHP function in class?
  60. Database entry removed on browser refresh, Ajax PHP jQuery
  61. jquery & ajax getting data from php in wordpress . admin-ajax.php returns 400
  62. Failed to load resource: the server responded with a status of 500 (Internal Server Error) through wp_admin_ajax.php
  63. How do I call a value from the datase using ajax
  64. Ajax filter with loadmore button
  65. Where to add my PHP codes for AJAX Jquery to work?
  66. How to use wp_ajax_set_post_thumbnail?
  67. Update $wpdb query with AJAX
  68. Can’t make lazy load for my site, help!
  69. How to reload a php script, using AJAX and jQuery
  70. AJAX to add to cart multiple products woocommerce
  71. wp_set_object_terms returns 500 error when called through AJAX function
  72. How can i send id of the currently posted form data through json response in custom wordpress plugin?
  73. Cannot successfully execute AJAX script to call function.php specific function. Using XAMPP localhost to test
  74. How can i get the same ajax result using WP REST API instead of admin-ajax?
  75. Custom theme admin-ajax.php 400 (Bad Request)
  76. Remove item from post_meta array via AJAX
  77. number of posts with “Load More”
  78. defined (‘ABSPATH’) false after AJAX post to other PHP-file
  79. AJAX Filter WHILE Loop not working WordPress
  80. Ajax not updating to database
  81. WordPress 404 when using AJAX to call php function
  82. wordpress ajax pagination
  83. how use php query in AJAX jquery
  84. Ajax Load more CPT via shortcode
  85. Why I’m Not Having Access to “$_POST” Data Outside My AJAX Callback?
  86. Submitting my form to the database and then redirecting to payment site
  87. Pass the updated value of aid from form using ajax
  88. 500 (Internal Server Error) of external php file
  89. Use jQuery and AJAX to get HTML
  90. Dynamic Gallery
  91. best way to communicate between php and jquery/javascript
  92. Loading a post’s content, into a div outside the loop, when it’s title is selected in a list
  93. Fatal error: Uncaught Error: Call to undefined function wp_nav_menu()
  94. ajax form function error
  95. AJAX: WordPress filters inside $html do not work as intended
  96. Why not showing all post by default in my jquery filter
  97. Load Meta box value into div AJAX [duplicate]
  98. Jquery autosave text area after typing
  99. Pass a PHP variable (loop-audio.php) to jQuery function (js/script.js)
  100. ajax problems on loading page [closed]