Revert "Use better naming and const in search-ui"

This reverts commit fed1cde.

Author: atextor

src/js/vendor/search-ui.js

@@ -193,20 +193,27 @@
   }
 
   function init (lunr, data) {
-    const index = { index: lunr.Index.load(data.index), store: data.store };
-    const isDebugEnabled = 'URLSearchParams' in window && new URLSearchParams(window.location.search).has('lunr-debug');
-
-    const debouncedSearch = debounce(() => {
+    var index = Object.assign({ index: lunr.Index.load(data.index), store: data.store })
+    var debug = 'URLSearchParams' in window && new URLSearchParams(window.location.search).has('lunr-debug')
+    var search = debounce(function () {
       try {
-        searchIndex(index.index, index.store, searchInput.value);
+        searchIndex(index.index, index.store, searchInput.value)
       } catch (err) {
-        if (isDebugEnabled) console.debug(`Invalid search query: ${searchInput.value} (${err.message})`);
+        if (debug) console.debug('Invalid search query: ' + searchInput.value + ' (' + err.message + ')')
       }
-    }, 100);
+    }, 100)
+    searchInput.addEventListener('keydown', search)
+
+    searchInput.addEventListener('keydown', function (event) {
+      if (event.key === 'Escape') searchInput.value = ''
+    })
 
-    searchInput.addEventListener('keydown', debouncedSearch);
-    searchInput.addEventListener('keydown', (event) => event.key === 'Escape' && (searchInput.value = ''));
-    searchInput.addEventListener('blur', () => { while (searchResult.firstChild) searchResult.removeChild(searchResult.firstChild); });
+    // this is prevented in case of mousedown attached to SearchResultItem
+    searchInput.addEventListener('blur', function (e) {
+      while (searchResult.firstChild) {
+        searchResult.removeChild(searchResult.firstChild)
+      }
+    })
   }
 
   return { init: init }