400 Bad Request when sending XHR from React.js to admin-ajax.php

Solved by adding an action to handle unauthenticated users:

add_action('wp_ajax_nopriv_xhrLink', 'handleXhrLink');

Related Posts:

  1. PHP “php://input” vs $_POST
  2. Google Maps API throws “Uncaught ReferenceError: google is not defined” only when using AJAX
  3. Access-Control-Allow-Origin error sending a jQuery Post to Google API’s
  4. Access-Control-Allow-Origin error sending a jQuery Post to Google API’s
  5. How to solve the error “SCRIPT7002: XMLHttpRequest: Network Error 0x80070005, Access is denied.” in IE
  6. Show spinner GIF during an $http request in AngularJS?
  7. Refresh HTML Page in Browser Automatically on Timer – Every 15 Min
  8. JavaScript implementation of Gzip
  9. jQuery: Performing synchronous AJAX requests
  10. ASP.NET MVC controller actions that return JSON or partial html
  11. jQuery’s .on() method combined with the submit event
  12. Ajax takes 10x as long as it should/could
  13. How to check if I am in admin-ajax.php?
  14. Best way to end WordPress ajax request and why?
  15. How to load wp_editor() through AJAX/jQuery
  16. How to cache json with wp-super cache
  17. Load minimum WordPress environment
  18. Why use wp_send_json() over echo json_encode()?
  19. Why use admin-ajax.php and how does it work?
  20. How to get a unique nonce for each Ajax request?
  21. Open a Thickbox with content trough AJAX
  22. Initialize TinyMCE editor / visual editor after AJAX insert
  23. Why not register shortcodes if is_admin dashboard?
  24. WordPress AJAX with Axios
  25. Why is die() used at the end of function that handles an Ajax request?
  26. Why might a plugin’s ‘do_shortcode’ not work in an AJAX request?
  27. Making my AJAX powered WordPress Crawlable
  28. Is there a JavaScript API? How to access public and private data in JS?
  29. Get Previous & Next posts by Post ID
  30. failed to load wp-admin/admin-ajax.php
  31. Using Backbone with the WordPress AJAX API
  32. Using Ajax with a Class file
  33. Ajax in a settings page (update_option is undefined)
  34. How to pass data parameter to ajax action function handler
  35. WordPress Ajax Data Security
  36. Displaying PHP Errors from admin-ajax.php
  37. wp_set_auth_cookie() doesn’t work in Ajax call
  38. gettext does not translate when called in ajax
  39. Execute one AJAX request after another AJAX request finished
  40. WP-AJAX vs WP REST API: What to use for requests to the website from outside?
  41. Ajax and autocomplete
  42. How to add to cart via AJAX Woocommerce [closed]
  43. Nonces and Cache
  44. SSL breaks customizer: page isn’t returned from ajax
  45. Why is a 500 error generated by admin-ajax.php not going into the Apache error log?
  46. Are ‘wp_ajax’ and ‘wp_ajax_nopriv’ exclusive to authenticated and non-authenticated users?
  47. How to HTML5 FormData Ajax
  48. admin-ajax.php vs Custom Page Template for Ajax Requests
  49. How to override WP_DEBUG for Ajax responses?
  50. Stop admin-ajax?
  51. redirect out of wp-admin, without losing admin-ajax.php
  52. Call to undefined function add_action()
  53. Is it safe to assume that a nonce may be validated more than once?
  54. Including WordPress in RESTful API
  55. Multiple ajax nonce requests
  56. Get posts with ajax
  57. admin-ajax.php doesn’t work when using POST data and Axios
  58. How to call a PHP function with Ajax when the user clicks a button
  59. REST API endpoint for elasticpress autosuggest
  60. Ajax for non-logged-in users
  61. Contact Form 7 Custom Post Action
  62. Custom Form with Ajax
  63. How to process ajax requests correctly using ajax plugins
  64. ajax – why multiple calls to wp_create_nonce() return same value?
  65. Update user meta using with ajax
  66. Registering AJAX callback function that is part of a class without instantiating the class in function.php
  67. WordPress function that makes HTML safe to be sent via AJAX request
  68. How do I hook an Ajax request into a PHP callback?
  69. AJAX request on the frontend always returns 0 if user is not admin
  70. admin-ajax.php returns 0. How do I debug it and fix it?
  71. Ajax requests without JQuery
  72. Admin Notification after save_post, when ajax saving in gutenberg
  73. How to properly use wp.ajax.post?
  74. Load tinyMCE / wp_editor() via AJAX [duplicate]
  75. How to tie built in AJAX to an add_action?
  76. Using Nonces for AJAX that only retrieves data
  77. WordPress AJAX Login Screen
  78. AJAX vs Fragment Caching for W3 Total Cache [closed]
  79. Saving (Updating) Post / Page Edits With AJAX
  80. Is there any way of of making an admin-ajax request without the use of die()?
  81. How to verify nonce from Bulk/Quick Edit in save_post?
  82. Using ajax on categories and wordpress loops
  83. Custom PHP endpoint for a plugin’s AJAX call
  84. Detecting post type within init action
  85. Ajax request returning full page code
  86. Basic question on passing variables to AJAX in WordPress
  87. Cannot load admin-ajax.php. No access-control allow origin*
  88. Initialize JS with an ajax loaded ACF form
  89. WordPress embeds in AJAX inserted content
  90. How do I send an ajax request and get a response back from a function?
  91. admin-ajax.php vs .load() in WordPress
  92. Delete row of custom table in WordPress using AJAX
  93. jQuery Autocomplete in WordPress
  94. How to link WordPress heartbeat to ajax form
  95. How can I get logged in user’s session data from admin-ajax?
  96. How-to debug wp_ajax_* hook callback?
  97. Metabox cloning via Admin Ajax call issue
  98. Gutenberg – how to correctly perform ajax request on backend
  99. get_template_part execute with ajax
  100. How to add WordPress nonces to ajax request
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)