From be208be7049e665c25f30627a3c966aae95b6b3c Mon Sep 17 00:00:00 2001
From: Quincy Morgan <2046746+quincylvania@users.noreply.github.com>
Date: Thu, 1 Oct 2020 12:12:46 -0400
Subject: [PATCH] Show tooltips on focus as well as hover (re: #8004)

---
 modules/ui/popover.js | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/modules/ui/popover.js b/modules/ui/popover.js
index 42ee586ee..a6174b687 100644
--- a/modules/ui/popover.js
+++ b/modules/ui/popover.js
@@ -171,8 +171,15 @@ export function uiPopover(klass) {
                 if (d3_event.buttons !== 0) return;
 
                 show.apply(this, arguments);
-            });
-            anchor.on(_pointerPrefix + 'leave.popover', function() {
+            })
+            .on(_pointerPrefix + 'leave.popover', function() {
+                hide.apply(this, arguments);
+            })
+            // show on focus too for better keyboard navigation support
+            .on('focus.popover', function() {
+                show.apply(this, arguments);
+            })
+            .on('blur.popover', function() {
                 hide.apply(this, arguments);
             });