feat: Add ESC keyboard handler

Author: Felix Hennig

src/js/07-search.js

@@ -4,33 +4,44 @@
   function openSearchPopover () {
     document.getElementById('search-background').style.display = 'block'
     document.getElementById('search').style.display = 'block'
+    // focus the textbox after popover appears
     var searchInput = document.querySelector('.pagefind-modular-input')
-    if (!searchInput) return
-    searchInput.focus()
+    if (searchInput) {
+      searchInput.focus()
+    }
+  }
+
+  function closeSearchPopover () {
+    document.getElementById('search-background').style.display = 'none'
+    document.getElementById('search').style.display = 'none'
   }
 
   // open the popover when clicking the magnifying glass search icon
   var searchButton = document.getElementById('search-button')
-  if (!searchButton) return
-  searchButton.addEventListener('click', function (event) {
-    event.stopPropagation()
-    openSearchPopover()
-  })
+  if (searchButton) {
+    searchButton.addEventListener('click', function (event) {
+      event.stopPropagation()
+      openSearchPopover()
+    })
+  }
 
-  // open the popover with ctrl+k
+  // close functionality when clicking the background
+  var searchBackground = document.getElementById('search-background')
+  if (searchBackground) {
+    searchBackground.addEventListener('click', function (e) {
+      e.stopPropagation() // trap event
+      closeSearchPopover()
+    })
+  }
+
+  // open/close with keyboard
   document.addEventListener('keydown', function (event) {
     if (event.ctrlKey && event.key === 'k') {
       event.preventDefault() // prevent focussing the URL bar in the browser
       openSearchPopover()
     }
-  })
-
-  // close functionality when clicking the background
-  var searchBackground = document.getElementById('search-background')
-  if (!searchBackground) return
-  searchBackground.addEventListener('click', function (e) {
-    e.stopPropagation() // trap event
-    document.getElementById('search-background').style.display = 'none'
-    document.getElementById('search').style.display = 'none'
+    if (event.key === 'Escape') {
+      closeSearchPopover()
+    }
   })
 })()