1 files changed, 28 insertions, 0 deletions
diff --git a/src/compiler/utils/namespaces.ts b/src/compiler/utils/namespaces.ts
new file mode 100644
index 000000000..01d9bd60b
--- /dev/null
+++ b/src/compiler/utils/namespaces.ts
@@ -0,0 +1,28 @@
+// The `foreign` namespace covers all DOM implementations that aren't HTML5.
+// It opts out of HTML5-specific a11y checks and case-insensitive attribute names.
+export const foreign = 'https://svelte.dev/docs#svelte_options';
+export const html = 'http://www.w3.org/1999/xhtml';
+export const mathml = 'http://www.w3.org/1998/Math/MathML';
+export const svg = 'http://www.w3.org/2000/svg';
+export const xlink = 'http://www.w3.org/1999/xlink';
+export const xml = 'http://www.w3.org/XML/1998/namespace';
+export const xmlns = 'http://www.w3.org/2000/xmlns';
+
+export const valid_namespaces = [
+	'foreign',
+	'html',
+	'mathml',
+	'svg',
+	'xlink',
+	'xml',
+	'xmlns',
+	foreign,
+	html,
+	mathml,
+	svg,
+	xlink,
+	xml,
+	xmlns
+];
+
+export const namespaces: Record<string, string> = { foreign, html, mathml, svg, xlink, xml, xmlns };