From a584ff134703cb340c90fef608646209d585cfb5 Mon Sep 17 00:00:00 2001
From: Manuel <30698007+manuel3108@users.noreply.github.com>
Date: Thu, 11 Dec 2025 01:31:58 +0100
Subject: [PATCH] fix: correctly print `!doctype` during `print` (#17341)
---
.changeset/smooth-comics-shine.md | 5 +++++
packages/svelte/src/compiler/print/index.js | 5 +++--
.../tests/print/samples/html-document/input.svelte | 11 +++++++++++
.../tests/print/samples/html-document/output.svelte | 12 ++++++++++++
4 files changed, 31 insertions(+), 2 deletions(-)
create mode 100644 .changeset/smooth-comics-shine.md
create mode 100644 packages/svelte/tests/print/samples/html-document/input.svelte
create mode 100644 packages/svelte/tests/print/samples/html-document/output.svelte
diff --git a/.changeset/smooth-comics-shine.md b/.changeset/smooth-comics-shine.md
new file mode 100644
index 0000000000..4bf26ed9f1
--- /dev/null
+++ b/.changeset/smooth-comics-shine.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: correctly print `!doctype` during `print`
diff --git a/packages/svelte/src/compiler/print/index.js b/packages/svelte/src/compiler/print/index.js
index 8b39bdd739..4aed743dba 100644
--- a/packages/svelte/src/compiler/print/index.js
+++ b/packages/svelte/src/compiler/print/index.js
@@ -112,12 +112,13 @@ function base_element(node, context) {
}
const multiline_attributes = attributes(node.attributes, child_context);
-
+ const is_doctype_node = node.name.toLowerCase() === '!doctype';
const is_self_closing =
is_void(node.name) || (node.type === 'Component' && node.fragment.nodes.length === 0);
let multiline_content = false;
- if (is_self_closing) {
+ if (is_doctype_node) child_context.write(`>`);
+ else if (is_self_closing) {
child_context.write(`${multiline_attributes ? '' : ' '}/>`);
} else {
child_context.write('>');
diff --git a/packages/svelte/tests/print/samples/html-document/input.svelte b/packages/svelte/tests/print/samples/html-document/input.svelte
new file mode 100644
index 0000000000..8f1b4accab
--- /dev/null
+++ b/packages/svelte/tests/print/samples/html-document/input.svelte
@@ -0,0 +1,11 @@
+
+
+
+
+
+ Svelte App
+
+
+ Hello World
+
+
diff --git a/packages/svelte/tests/print/samples/html-document/output.svelte b/packages/svelte/tests/print/samples/html-document/output.svelte
new file mode 100644
index 0000000000..765f9ca84b
--- /dev/null
+++ b/packages/svelte/tests/print/samples/html-document/output.svelte
@@ -0,0 +1,12 @@
+
+
+
+
+
+ Svelte App
+
+ Hello World
+