From c65378c3a828429fd50c94dfb06e884d1286d8f5 Mon Sep 17 00:00:00 2001
From: Hsieh Chin Fan <pham@topo.tw>
Date: Sat, 19 Oct 2024 00:42:50 +0800
Subject: fix: check validity for DocLink

---
 src/dumbyUtils.mjs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/dumbyUtils.mjs b/src/dumbyUtils.mjs
index 6a77548..40afbd3 100644
--- a/src/dumbyUtils.mjs
+++ b/src/dumbyUtils.mjs
@@ -218,10 +218,12 @@ export const createGeoLink = (link) => {
  * @param {HTMLElement} Elements contains anchor elements for doclinks
  */
 export const createDocLink = link => {
+  const label = decodeURIComponent(link.href.split('#')[1])
+  const selector = link.title.split('=>')[1] ?? label ? '#' + label : null
+  if (!selector) return false
+
   link.classList.add('with-leader-line', 'doclink')
   link.lines = []
-  const label = decodeURIComponent(link.href.split('#')[1])
-  const selector = link.title.split('=>')[1] ?? '#' + label
 
   link.onmouseover = () => {
     const targets = document.querySelectorAll(selector)
-- 
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