check if anchor link exists on the page

src/components/accordion-item/accordion-item.tsx

@@ -130,17 +130,19 @@ export class AccordionItem {
     if (anchor.length > 0) {
       anchor = anchor.substr(1);
       let target = document.querySelectorAll(`[id=${anchor}]`)[0];
-      let targetParent = target.closest('.hy-accordion__item');
-      let targetContent = targetParent.querySelectorAll('.hy-accordion__content')[0];
+      if (target) {
+        let targetParent = target.closest('.hy-accordion__item');
+        let targetContent = targetParent.querySelectorAll('.hy-accordion__content')[0];
 
-      this.expandSection(targetContent);
-      target.setAttribute('aria-expanded', 'true');
-      targetParent.classList.add('hy-accordion__item__is-open');
+        this.expandSection(targetContent);
+        target.setAttribute('aria-expanded', 'true');
+        targetParent.classList.add('hy-accordion__item__is-open');
 
-      const containerId = targetParent.parentElement.parentElement.id;
-      if (containerId.length > 0) {
-        let accordion = document.querySelectorAll(`#${containerId}`)[0];
-        accordion.querySelector(`#${target.getAttribute('aria-controls')}`).setAttribute('aria-hidden', 'false');
+        const containerId = targetParent.parentElement.parentElement.id;
+        if (containerId.length > 0) {
+          let accordion = document.querySelectorAll(`#${containerId}`)[0];
+          accordion.querySelector(`#${target.getAttribute('aria-controls')}`).setAttribute('aria-hidden', 'false');
+        }
       }
     }
   }