diff --git a/.changeset/fruity-knives-ring.md b/.changeset/fruity-knives-ring.md
new file mode 100644
index 000000000000..169945077674
--- /dev/null
+++ b/.changeset/fruity-knives-ring.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: set Root start/end to null when fragment contains only whitespace
diff --git a/packages/svelte/src/compiler/phases/1-parse/index.js b/packages/svelte/src/compiler/phases/1-parse/index.js
index 8f7ef76be567..04ac9f12f92b 100644
--- a/packages/svelte/src/compiler/phases/1-parse/index.js
+++ b/packages/svelte/src/compiler/phases/1-parse/index.js
@@ -115,7 +115,10 @@ export class Parser {
 			e.unexpected_eof(this.index);
 		}
 
-		if (this.root.fragment.nodes.length) {
+		const has_content = this.root.fragment.nodes.some(
+			(node) => node.type !== 'Text' || node.data.trim().length > 0
+		);
+		if (has_content) {
 			let start = /** @type {number} */ (this.root.fragment.nodes[0].start);
 			while (regex_whitespace.test(template[start])) start += 1;
 
diff --git a/packages/svelte/tests/parser-modern/samples/script-style-no-markup/input.svelte b/packages/svelte/tests/parser-modern/samples/script-style-no-markup/input.svelte
new file mode 100644
index 000000000000..c4dc4d5271af
--- /dev/null
+++ b/packages/svelte/tests/parser-modern/samples/script-style-no-markup/input.svelte
@@ -0,0 +1,6 @@
+<script>
+	// script and style but no markup
+</script>
+<style>
+	div { color: red; }
+</style>
diff --git a/packages/svelte/tests/parser-modern/samples/script-style-no-markup/output.json b/packages/svelte/tests/parser-modern/samples/script-style-no-markup/output.json
new file mode 100644
index 000000000000..33674de5041f
--- /dev/null
+++ b/packages/svelte/tests/parser-modern/samples/script-style-no-markup/output.json
@@ -0,0 +1,112 @@
+{
+	"css": {
+		"type": "StyleSheet",
+		"start": 54,
+		"end": 91,
+		"attributes": [],
+		"children": [
+			{
+				"type": "Rule",
+				"prelude": {
+					"type": "SelectorList",
+					"start": 63,
+					"end": 66,
+					"children": [
+						{
+							"type": "ComplexSelector",
+							"start": 63,
+							"end": 66,
+							"children": [
+								{
+									"type": "RelativeSelector",
+									"combinator": null,
+									"selectors": [
+										{
+											"type": "TypeSelector",
+											"name": "div",
+											"start": 63,
+											"end": 66
+										}
+									],
+									"start": 63,
+									"end": 66
+								}
+							]
+						}
+					]
+				},
+				"block": {
+					"type": "Block",
+					"start": 67,
+					"end": 82,
+					"children": [
+						{
+							"type": "Declaration",
+							"start": 69,
+							"end": 79,
+							"property": "color",
+							"value": "red"
+						}
+					]
+				},
+				"start": 63,
+				"end": 82
+			}
+		],
+		"content": {
+			"start": 61,
+			"end": 83,
+			"styles": "\n\tdiv { color: red; }\n",
+			"comment": null
+		}
+	},
+	"js": [],
+	"start": null,
+	"end": null,
+	"type": "Root",
+	"fragment": {
+		"type": "Fragment",
+		"nodes": [
+			{
+				"type": "Text",
+				"start": 53,
+				"end": 54,
+				"raw": "\n",
+				"data": "\n"
+			}
+		]
+	},
+	"options": null,
+	"instance": {
+		"type": "Script",
+		"start": 0,
+		"end": 53,
+		"context": "default",
+		"content": {
+			"type": "Program",
+			"start": 8,
+			"end": 44,
+			"loc": {
+				"start": {
+					"line": 1,
+					"column": 0
+				},
+				"end": {
+					"line": 3,
+					"column": 0
+				}
+			},
+			"body": [],
+			"sourceType": "module",
+			"trailingComments": [
+				{
+					"type": "Line",
+					"value": " script and style but no markup",
+					"start": 10,
+					"end": 43
+				}
+			]
+		},
+		"attributes": []
+	}
+}