From d7f86ef6d3027359a68d8dfd62e2a87c20fb791e Mon Sep 17 00:00:00 2001
From: Simon Li <orpheus+devel@gmail.com>
Date: Sat, 7 Dec 2019 14:34:56 +0000
Subject: [PATCH 1/2] Toolbar buttons tooltip: show help instead of label

---
 notebook/static/notebook/js/toolbar.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/notebook/static/notebook/js/toolbar.js b/notebook/static/notebook/js/toolbar.js
index 9f8f59241e..0e47e3470f 100644
--- a/notebook/static/notebook/js/toolbar.js
+++ b/notebook/static/notebook/js/toolbar.js
@@ -94,7 +94,7 @@ define(['jquery','base/js/i18n'], function($, i18n) {
                 }
                 var button  = $('<button/>')
                     .addClass('btn btn-default')
-                    .attr("title", el.label||i18n.msg._(action.help))
+                    .attr("title", i18n.msg._(action.help))
                     .append(
                         $("<i/>").addClass(el.icon||(action||{icon:'fa-exclamation-triangle'}).icon).addClass('fa')
                     );

From 5d4794767564d96530ac5d37f69493f8e24f1cab Mon Sep 17 00:00:00 2001
From: Simon Li <orpheus+devel@gmail.com>
Date: Sun, 17 May 2020 22:07:31 +0100
Subject: [PATCH 2/2] Toolbar buttons tooltip: fallback to label as tooltip,
 set aria-label

---
 notebook/static/notebook/js/toolbar.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/notebook/static/notebook/js/toolbar.js b/notebook/static/notebook/js/toolbar.js
index 0e47e3470f..295975c302 100644
--- a/notebook/static/notebook/js/toolbar.js
+++ b/notebook/static/notebook/js/toolbar.js
@@ -94,7 +94,8 @@ define(['jquery','base/js/i18n'], function($, i18n) {
                 }
                 var button  = $('<button/>')
                     .addClass('btn btn-default')
-                    .attr("title", i18n.msg._(action.help))
+                    .attr("aria-label", el.label)
+                    .attr("title", i18n.msg._(action.help)||el.label)
                     .append(
                         $("<i/>").addClass(el.icon||(action||{icon:'fa-exclamation-triangle'}).icon).addClass('fa')
                     );