From c0ca68cb83be87354bb85cb2a8c77e40f4f1d480 Mon Sep 17 00:00:00 2001
From: Andrew Kingston <aptkingston@ssl-mail.com>
Date: Wed, 4 Aug 2021 14:38:20 +0100
Subject: [PATCH] Fix parsing of numbers when assigning a default value to a
 number field

---
 .../standard-components/src/forms/NumberField.svelte     | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/standard-components/src/forms/NumberField.svelte b/packages/standard-components/src/forms/NumberField.svelte
index db34fca60b..dcaf4e7c43 100644
--- a/packages/standard-components/src/forms/NumberField.svelte
+++ b/packages/standard-components/src/forms/NumberField.svelte
@@ -2,10 +2,17 @@
   import StringField from "./StringField.svelte"
 
   export let defaultValue
+
+  const parseNumber = val => {
+    if (val == null) {
+      return null
+    }
+    return isNaN(val) ? null : parseFloat(val)
+  }
 </script>
 
 <StringField
   {...$$props}
   type="number"
-  defaultValue={isNaN(defaultValue) ? null : parseFloat(defaultValue)}
+  defaultValue={parseNumber(defaultValue)}
 />