JS - Wordpress Metabox.io ajax fetch custom taxonomy metadata

wp-mb-tax-admin.js

    // -------------------------
    // Fetch Taxonomy Term & Meta
    // -------------------------
    // GOAL: When a user selects a taxonomy term (from a MetaBox.io field) this fetches the 
    // term & it's metadata and loads it into a Custom HTML block
    // -------------------------
    // FORUM - https://metabox.io/support/topic/show-data-from-related-post-term-after-selection/
    // PHP - https://gist.github.com/21fed6266453de7ba76b3d2bc0e5a06f
    // JS - https://gist.github.com/3b636d0c7e55ce6dc58ceba3de9a974e
    // -------------------------

    // fetch taxonomy metadata and load it into view
    let get_job_tax_html = function get_job_tax_html(tax) {
      let htmlField = `.${tax}_html`;
      jQuery(`${htmlField}`).slideUp();
      // jQuery(`${htmlField}`).addClass('hidden');
      jQuery(`${htmlField} .rwmb-input > *`).empty();
      let termID = jQuery('#' + tax).val();
      if (termID !== '') {
        let data = {
          action: 'get_json_term_meta',
          termID: termID
        };
        let jqReq = jQuery.get(ajaxurl, data);
        jqReq.done(function(response) {
          // console.log(tax, response);
          jQuery.each(response, function(key, val) {
            // use this on first run to create the HTML to place inside the Custom HTML field
            // jQuery(`<span class="${key}">${val[0]}</span>`).appendTo(`${htmlField} .rwmb-input`);
            // as long as html structure is in place, this will inject the matching data
            if (val.length) jQuery(`${htmlField} .rwmb-input .${key}`).text(val[0]);
          });
          // jQuery(`${htmlField}`).removeClass('hidden');
          jQuery(`${htmlField}`).slideDown();
        });
      }
    }

    // PM - fetch term meta on init & then again on change
    get_job_tax_html('job_pm_taxonomy');
    jQuery('select#job_pm_taxonomy').change(function() {
      get_job_tax_html('job_pm_taxonomy');
    });
    // Contact - fetch term meta on init & then again on change
    get_job_tax_html('job_contact_taxonomy');
    jQuery('select#job_contact_taxonomy').change(function() {
      get_job_tax_html('job_contact_taxonomy');
    });