From 45e385721cc3493029ad6e0a7dc65f0c6594959a Mon Sep 17 00:00:00 2001
From: Simon H <5968653+dummdidumm@users.noreply.github.com>
Date: Fri, 23 Feb 2024 09:50:03 +0100
Subject: [PATCH] fix: don't clear date input on temporarily invalid value
 (#10616)

fixes #7897
No test because this is only visually observable
---
 .changeset/blue-rules-juggle.md               | 5 +++++
 packages/svelte/src/internal/client/render.js | 6 ++++++
 2 files changed, 11 insertions(+)
 create mode 100644 .changeset/blue-rules-juggle.md

diff --git a/.changeset/blue-rules-juggle.md b/.changeset/blue-rules-juggle.md
new file mode 100644
index 0000000000..6da0270910
--- /dev/null
+++ b/.changeset/blue-rules-juggle.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: don't clear date input on temporarily invalid value
diff --git a/packages/svelte/src/internal/client/render.js b/packages/svelte/src/internal/client/render.js
index 3d8d855e86..c2868586bf 100644
--- a/packages/svelte/src/internal/client/render.js
+++ b/packages/svelte/src/internal/client/render.js
@@ -1048,6 +1048,12 @@ export function bind_value(dom, get_value, update) {
 			return;
 		}
 
+		if (dom.type === 'date' && !value && !dom.value) {
+			// Handles the case where a temporarily invalid date is set (while typing, for example with a leading 0 for the day)
+			// and prevents this state from clearing the other parts of the date input (see https://github.com/sveltejs/svelte/issues/7897)
+			return;
+		}
+
 		dom.value = stringify(value);
 	});
 }