How to add a character count to Wysiwyg fields

Created by Phil Kurth, Modified on Sun, 25 Sep, 2022 at 1:58 PM by Phil Kurth

This example uses the snippet found here and implements a count at the bottom of the Wysiwyg field as per the following screenshot:

To implement this, simply past the following snippet into your functions.php file, a template file, or a custom plugin and set the `characterLimit` JS variable to the desired limit.

<?php

add_action( 'af/form/after_fields', function () {
  ?>
  <script type="text/javascript">
    jQuery(function () {
      acf.addFilter('wysiwyg_tinymce_settings', function (mceInit) {
        mceInit.elementpath = false;
        mceInit.setup = function (ed) {
          var characterLimit = 1000, // todo - set desired character count here
            edContainer,
            countChar,
            colorOriginal;

          ed.on('init', function (e) {
            edContainer = jQuery(ed.iframeElement).closest('.acf-input');
            countChar = edContainer.find('.mce-statusbar .mce-flow-layout')
              .prepend('<div class="mce-path mce-flow-layout-item mce-first count-char"><span class="count-char-current">0</span><span>/' + characterLimit + '</span></div>')
              .find('.count-char-current');
            colorOriginal = countChar.css('color');
          });

          var limit = function (e) {

            var node = ed.getBody(),
              text = (node.innerText || node.textContent),
              textTrim = text.trim(),
              length = (textTrim.length === 0) ? 0 : text.length;

            if (length > characterLimit) {
              countChar.css('color', 'red');
            } else {
              countChar.css('color', colorOriginal);
            }

            countChar.text(length);
          };

          ed.on('change', limit);
          ed.on('keyup', limit);
        };
        return mceInit;
      });

    });
  </script>
  <?php
} );