fix: preserve key

7nik · 7nik · commit 8fdb47d050ee · 2025-09-09T20:15:40.000+03:00
diff --git a/packages/svelte/src/internal/client/dom/blocks/each.js b/packages/svelte/src/internal/client/dom/blocks/each.js
@@ -481,9 +481,10 @@ function reconcile(
 						for (j = 0; j < length; j += 1) {
 							var k = get_key(array[j], j);
 							if (map.has(k)) {
-								k = String(k);
-								if (k.startsWith('[object ')) k = null;
-								each_key_duplicate(String(j), String(map.get(k)), k);
+								/** @type {string|null} */
+								var key_name = String(k);
+								if (key_name.startsWith('[object ')) key_name = null;
+								each_key_duplicate(String(j), String(map.get(k)), key_name);
 							}
 							map.set(k, j);
 						}

Original file line number	Diff line number	Diff line change
`@@ -481,9 +481,10 @@ function reconcile(`
`481`	`481`	`for (j = 0; j < length; j += 1) {`
`482`	`482`	`var k = get_key(array[j], j);`
`483`	`483`	`if (map.has(k)) {`
`484`		`- k = String(k);`
`485`		`- if (k.startsWith('[object ')) k = null;`
`486`		`- each_key_duplicate(String(j), String(map.get(k)), k);`
	`484`	`+ /** @type {string\|null} */`
	`485`	`+ var key_name = String(k);`
	`486`	`+ if (key_name.startsWith('[object ')) key_name = null;`
	`487`	`+ each_key_duplicate(String(j), String(map.get(k)), key_name);`
`487`	`488`	`}`
`488`	`489`	`map.set(k, j);`
`489`	`490`	`}`