From dcf59de9d4366f47a2073247eafed9cef16a74ba Mon Sep 17 00:00:00 2001
From: Kyle Sosnowski <ktsosno@gmail.com>
Date: Mon, 13 May 2019 22:10:40 -0700
Subject: [PATCH] Prevent undefined exception on missing ID

---
 src/anchor-link.js | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/anchor-link.js b/src/anchor-link.js
index 05a0c73..a6c6e99 100644
--- a/src/anchor-link.js
+++ b/src/anchor-link.js
@@ -20,11 +20,15 @@ class AnchorLink extends Component {
     }
     const id = e.currentTarget.getAttribute('href').slice(1)
     const $anchor = document.getElementById(id);
-    const offsetTop = $anchor.getBoundingClientRect().top + window.pageYOffset;
-    window.scroll({
-      top: offsetTop - offset(),
-      behavior: 'smooth'
-    })
+
+    if ($anchor) {
+      const offsetTop = $anchor.getBoundingClientRect().top + window.pageYOffset;
+      window.scroll({
+        top: offsetTop - offset(),
+        behavior: 'smooth'
+      })
+    }
+
     if (this.props.onClick) {this.props.onClick(e)}
   }
   render() {