fix: avoid assigning input.value if the value is the same to fix minlength (#13574)

* fix: avoid assigning input.value if the value is the same to fix `minlength`

* chore: changeset

Author: paoloricciuti

.changeset/slow-badgers-invite.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: avoid assigning input.value if the value is the same to fix `minlength`

packages/svelte/src/internal/client/dom/elements/attributes.js

@@ -55,8 +55,8 @@ export function remove_input_defaults(input) {
 export function set_value(element, value) {
 	// @ts-expect-error
 	var attributes = (element.__attributes ??= {});
-
-	if (attributes.value === (attributes.value = value)) return;
+	// @ts-expect-error
+	if (attributes.value === (attributes.value = value) || element.value === value) return;
 	// @ts-expect-error
 	element.value = value;
 }

packages/svelte/src/internal/client/dom/elements/bindings/input.js

@@ -60,8 +60,12 @@ export function bind_value(input, get, set = get) {
 			return;
 		}
 
-		// @ts-expect-error the value is coerced on assignment
-		input.value = value ?? '';
+		// don't set the value of the input if it's the same to allow
+		// minlength to work properly
+		if (value !== input.value) {
+			// @ts-expect-error the value is coerced on assignment
+			input.value = value ?? '';
+		}
 	});
 }