From 0263d1742ce8ad25f0f2de30beebae69b2f55f10 Mon Sep 17 00:00:00 2001
From: Alessandro Chitolina <alekitto@gmail.com>
Date: Mon, 25 Sep 2017 09:09:01 +0200
Subject: rewritten scrollspy without jquery

---
 js/src/dom/selectorEngine.js | 42 ++++++++++++++++++++++++++++++++++++++----
 1 file changed, 38 insertions(+), 4 deletions(-)

(limited to 'js/src/dom/selectorEngine.js')

diff --git a/js/src/dom/selectorEngine.js b/js/src/dom/selectorEngine.js
index a3e88ad6e..e51516445 100644
--- a/js/src/dom/selectorEngine.js
+++ b/js/src/dom/selectorEngine.js
@@ -111,10 +111,6 @@ const SelectorEngine = (() => {
         return null
       }
 
-      if (selector.indexOf('#') === 0) {
-        return SelectorEngine.findOne(selector, element)
-      }
-
       return findFn.call(element, selector)
     },
 
@@ -135,8 +131,46 @@ const SelectorEngine = (() => {
       return children.filter((child) => this.matches(child, selector))
     },
 
+    parents(element, selector) {
+      if (typeof selector !== 'string') {
+        return null
+      }
+
+      const parents = []
+
+      let ancestor = element.parentNode
+      while (ancestor && ancestor.nodeType === Node.ELEMENT_NODE) {
+        if (fnMatches.call(ancestor, selector)) {
+          parents.push(ancestor)
+        }
+
+        ancestor = ancestor.parentNode
+      }
+
+      return parents
+    },
+
     closest(element, selector) {
       return fnClosest(element, selector)
+    },
+
+    prev(element, selector) {
+      if (typeof selector !== 'string') {
+        return null
+      }
+
+      const siblings = []
+
+      let previous = element.previousSibling
+      while (previous) {
+        if (fnMatches.call(previous, selector)) {
+          siblings.push(previous)
+        }
+
+        previous = previous.previousSibling
+      }
+
+      return siblings
     }
   }
 })()
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