Toggle Accordion Attributes for Accessibility

toggle-accordion-attributes.js

$(".accordion-trigger").click(function () {
  $(this).toggleAttrVal("aria-expanded", "false", "true"); //toggle trigger attribute
  $(this)
    .siblings(".accordion-content")
    .toggleAttrVal("aria-hidden", "true", "false"); //toggle content attribute
});

// jquery toggle just the attribute value
$.fn.toggleAttrVal = function (attr, val1, val2) {
  var test = $(this).attr(attr);
  if (test === val1) {
    $(this).attr(attr, val2);
    return this;
  }
  if (test === val2) {
    $(this).attr(attr, val1);
    return this;
  }
  // default to val1 if neither
  $(this).attr(attr, val1);
  return this;
};