fix: better account for render tags when pruning CSS (#14456)

Fixes #14399 Add a mechanism to connect render tags to snippets to know where to walk when coming across render tags --------- Co-authored-by: Simon H <[email protected]> Co-authored-by: Simon Holthausen <[email protected]>
sveltejs · Nov 28, 2024 · c4ac0e0 · c4ac0e0
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diff --git a/.changeset/twelve-squids-wink.md b/.changeset/twelve-squids-wink.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: better account for render tags when pruning CSS
diff --git a/packages/svelte/src/compiler/phases/1-parse/state/tag.js b/packages/svelte/src/compiler/phases/1-parse/state/tag.js
@@ -314,7 +314,10 @@ function open(parser) {
 				name
 			},
 			parameters: function_expression.params,
-			body: create_fragment()
+			body: create_fragment(),
+			metadata: {
+				sites: new Set()
+			}
 		});
 		parser.stack.push(block);
 		parser.fragments.push(block.body);
@@ -605,7 +608,8 @@ function special(parser) {
 			metadata: {
 				dynamic: false,
 				args_with_call_expression: new Set(),
-				path: []
+				path: [],
+				snippets: new Set()
 			}
 		});
 	}