From 3917f02067fe8bcc8a70ff16d2748203b6c41535 Mon Sep 17 00:00:00 2001
From: Bryan Housel <bryan@mapbox.com>
Date: Fri, 2 Mar 2018 00:42:24 -0500
Subject: [PATCH] When combobox is attached to textarea, let user up/down arrow
 (closes #4750)

---
 modules/lib/d3.combobox.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/lib/d3.combobox.js b/modules/lib/d3.combobox.js
index 60c2ecbdc..a33ba9e1c 100644
--- a/modules/lib/d3.combobox.js
+++ b/modules/lib/d3.combobox.js
@@ -36,6 +36,7 @@ export function d3combobox() {
             .selectAll('div.combobox')
             .filter(function(d) { return d === input.node(); });
         var shown = !wrapper.empty();
+        var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
 
         input
             .classed('combobox-input', true)
@@ -139,11 +140,13 @@ export function d3combobox() {
                    break;
                // up arrow
                case 38:
+                   if (tagName === 'textarea' && !shown) return;
                    nav(-1);
                    d3_event.preventDefault();
                    break;
                // down arrow
                case 40:
+                   if (tagName === 'textarea' && !shown) return;
                    nav(+1);
                    d3_event.preventDefault();
                    break;