From 5555b61e87ae96fcc0aa627986ff30dc9725807e Mon Sep 17 00:00:00 2001
From: Bryan Housel <bryan@mapbox.com>
Date: Sun, 17 Jun 2018 11:51:51 -0400
Subject: [PATCH] Fix bug causing 0 to be written into a numeric field when
 tabbing (closes #5087)

---
 modules/ui/fields/input.js | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/modules/ui/fields/input.js b/modules/ui/fields/input.js
index 3ba76dad7..73023d891 100644
--- a/modules/ui/fields/input.js
+++ b/modules/ui/fields/input.js
@@ -110,11 +110,13 @@ export function uiFieldText(field, context) {
     function change(onInput) {
         return function() {
             var t = {};
-            var val = utilGetSetValue(input) || undefined;
+            var val = utilGetSetValue(input).trim() || undefined;
 
-            if (!onInput && field.type === 'number') {
-                val = clamped(parsed(val)) + '';
-                utilGetSetValue(input, val);
+            if (!onInput) {
+                if (field.type === 'number' && val !== undefined) {
+                    val = clamped(parsed(val)) + '';
+                }
+                utilGetSetValue(input, val || '');
             }
             t[field.key] = val;
             dispatch.call('change', this, t, onInput);