chore: remove redundant hydration code

trueadm · trueadm · commit 0d7ba6ab26b2 · 2023-11-29T14:22:09.000Z
diff --git a/.changeset/sour-forks-stare.md b/.changeset/sour-forks-stare.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+chore: remove redundant hydration code
diff --git a/packages/svelte/src/internal/client/hydration.js b/packages/svelte/src/internal/client/hydration.js
@@ -68,12 +68,11 @@ export function hydrate_block_anchor(anchor_node, is_controlled) {
 			let fragment = target_node.$$fragment;
 			if (fragment === undefined) {
 				fragment = get_hydration_fragment(target_node);
-				// @ts-ignore remove to prevent memory leaks
-				target_node.$$fragment = undefined;
 			}
 			set_current_hydration_fragment(fragment);
 		} else {
-			set_current_hydration_fragment([/** @type {Element} */ (target_node.firstChild)]);
+			const firstChild = /** @type {Element | null} */ (target_node.firstChild);
+			set_current_hydration_fragment(firstChild === null ? [] : [firstChild]);
 		}
 	}
 }

-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +'svelte': patch
 +---
++
 +chore: remove redundant hydration code
Original file line number	Diff line number	Diff line change
`@@ -68,12 +68,11 @@ export function hydrate_block_anchor(anchor_node, is_controlled) {`
`68`	`68`	`let fragment = target_node.$$fragment;`
`69`	`69`	`if (fragment === undefined) {`
`70`	`70`	`fragment = get_hydration_fragment(target_node);`
`71`		`- // @ts-ignore remove to prevent memory leaks`
`72`		`- target_node.$$fragment = undefined;`
`73`	`71`	`}`
`74`	`72`	`set_current_hydration_fragment(fragment);`
`75`	`73`	`} else {`
`76`		`- set_current_hydration_fragment([/** @type {Element} */ (target_node.firstChild)]);`
	`74`	`+ const firstChild = /** @type {Element \| null} */ (target_node.firstChild);`
	`75`	`+ set_current_hydration_fragment(firstChild === null ? [] : [firstChild]);`
`77`	`76`	`}`
`78`	`77`	`}`
`79`	`78`	`}`