fix: prevent duplicates

daimond113 · daimond113 · commit 617e8e335cb2 · 2025-07-24T13:20:29.000+02:00
diff --git a/packages/svelte/src/internal/server/index.js b/packages/svelte/src/internal/server/index.js
@@ -205,8 +205,10 @@ export function spread_attributes(attrs, css_hash, classes, styles, flags = 0) {
 		if (!ignore_defaults) {
 			if (name === 'defaultvalue') {
 				name = 'value';
+				if (attrs[name]) continue;
 			} else if (name === 'defaultchecked') {
 				name = 'checked';
+				if (attrs[name]) continue;
 			}
 		}
 
diff --git a/packages/svelte/tests/runtime-runes/samples/form-default-value-from-spread/_config.js b/packages/svelte/tests/runtime-runes/samples/form-default-value-from-spread/_config.js
@@ -5,5 +5,7 @@ export default test({
 	html: `
 		<input value="a">
 		<input type="checkbox" checked>
+		<input value="b">
+		<input type="checkbox">
 `
 });
diff --git a/packages/svelte/tests/runtime-runes/samples/form-default-value-from-spread/main.svelte b/packages/svelte/tests/runtime-runes/samples/form-default-value-from-spread/main.svelte
@@ -4,4 +4,5 @@
 </script>
 
 <input {...text} />
-<input type="checkbox" {...checkbox} />
+<input type="checkbox" {...checkbox} />
+<input value="b" {...text} />

Original file line number	Diff line number	Diff line change
`@@ -205,8 +205,10 @@ export function spread_attributes(attrs, css_hash, classes, styles, flags = 0) {`
`205`	`205`	`if (!ignore_defaults) {`
`206`	`206`	`if (name === 'defaultvalue') {`
`207`	`207`	`name = 'value';`
	`208`	`+ if (attrs[name]) continue;`
`208`	`209`	`} else if (name === 'defaultchecked') {`
`209`	`210`	`name = 'checked';`
	`211`	`+ if (attrs[name]) continue;`
`210`	`212`	`}`
`211`	`213`	`}`
`212`	`214`