fix: hr, script and template as valid select children (#11344)

Closes #11342
---------

Co-authored-by: Jeremiasz Major <[email protected]>

Author: paoloricciuti

.changeset/cyan-squids-drive.md

@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: make hr, script and template valid select children

packages/svelte/src/constants.js

@@ -158,7 +158,14 @@ export function is_tag_valid_with_parent(tag, parent_tag) {
 	switch (parent_tag) {
 		// https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inselect
 		case 'select':
-			return tag === 'option' || tag === 'optgroup' || tag === '#text';
+			return (
+				tag === 'option' ||
+				tag === 'optgroup' ||
+				tag === '#text' ||
+				tag === 'hr' ||
+				tag === 'script' ||
+				tag === 'template'
+			);
 		case 'optgroup':
 			return tag === 'option' || tag === '#text';
 		// Strictly speaking, seeing an <option> doesn't mean we're in a <select>

packages/svelte/tests/validator/samples/invalid-node-placement-3/errors.json

@@ -0,0 +1 @@
+[]

packages/svelte/tests/validator/samples/invalid-node-placement-3/input.svelte

@@ -0,0 +1,12 @@
+<script>
+</script>
+
+<select>
+	<option value="0">The</option>
+	<hr>
+	<script>
+		console.log("hei");
+	</script>
+	<template>Cool</template>
+	<option value="1">bug</option>
+</select>