fix: skip doctype output when config doctype is falsy

cossssmin · cossssmin · commit 4516b0ccfd39 · 2026-05-25T22:48:20.000+03:00
diff --git a/src/build.ts b/src/build.ts
@@ -97,7 +97,7 @@ export async function build(configInput?: Partial<MaizzleConfig> | string): Prom
         }
 
         html = await events.fireAfterTransform({ config, template, html })
-        html = `${doctype}\n${html}`
+        if (doctype) html = `${doctype}\n${html}`
 
         const htmlOut = stripForHtml(html)
         const sfcOutputPath = rendered.outputPath
diff --git a/src/render/index.ts b/src/render/index.ts
@@ -67,7 +67,7 @@ export async function render(
     if (rendered.templateConfig.useTransformers !== false) {
       html = await runTransformers(html, rendered.templateConfig, isFile ? resolve(template) : undefined, doctype, rendered.tailwindBlocks)
     }
-    html = `${doctype}\n${html}`
+    if (doctype) html = `${doctype}\n${html}`
 
     const globalPlaintext = rendered.templateConfig.plaintext
     const sfcPlaintext = rendered.plaintext
diff --git a/src/serve.ts b/src/serve.ts
@@ -363,7 +363,7 @@ async function serveRenderedTemplate(url: string, config: MaizzleConfig, rendere
     const doctype = rendered.doctype ?? templateConfig.doctype ?? '<!DOCTYPE html>'
 
     html = await runTransformers(html, templateConfig, absolutePath, doctype, rendered.tailwindBlocks)
-    html = `${doctype}\n${html}`
+    if (doctype) html = `${doctype}\n${html}`
 
     res.setHeader('Content-Type', 'text/html')
     res.end(stripForHtml(html))
@@ -413,7 +413,7 @@ async function serveHighlightedSource(url: string, config: MaizzleConfig, render
     const doctype = rendered.doctype ?? templateConfig.doctype ?? '<!DOCTYPE html>'
     html = await runTransformers(html, templateConfig, absolutePath, doctype, rendered.tailwindBlocks)
 
-    html = stripForHtml(`${doctype}\n${html}`)
+    html = stripForHtml(doctype ? `${doctype}\n${html}` : html)
 
     const hl = await getHighlighter()
     const highlighted = hl.codeToHtml(html, {
@@ -624,7 +624,7 @@ async function serveEmailEndpoint(url: string, req: any, res: any, config: Maizz
     const templateConfig = rendered.templateConfig
     const doctype = rendered.doctype ?? templateConfig.doctype ?? '<!DOCTYPE html>'
     html = await runTransformers(html, templateConfig, absolutePath, doctype, rendered.tailwindBlocks)
-    html = `${doctype}\n${html}`
+    if (doctype) html = `${doctype}\n${html}`
 
     const text = createPlaintext(stripForPlaintext(html))
     html = stripForHtml(html)
diff --git a/src/tests/render/basic.test.ts b/src/tests/render/basic.test.ts
@@ -110,6 +110,19 @@ describe('render', () => {
       expect(result.html).toMatch(/^<!DOCTYPE html>\n/)
     })
 
+    it('omits doctype when config doctype is false', async () => {
+      const result = await render(`
+        <template>
+          <div>Test</div>
+        </template>
+      `, {
+        doctype: false,
+      })
+
+      expect(result.html).not.toMatch(/doctype/i)
+      expect(result.html.startsWith('\n')).toBe(false)
+    })
+
     it('uses custom doctype from config', async () => {
       const result = await render(`
         <template>

Original file line number	Diff line number	Diff line change
`@@ -97,7 +97,7 @@ export async function build(configInput?: Partial<MaizzleConfig> \| string): Prom`
`97`	`97`	`}`
`98`	`98`
`99`	`99`	`html = await events.fireAfterTransform({ config, template, html })`
`100`		- html = `${doctype}\n${html}`
	`100`	+ if (doctype) html = `${doctype}\n${html}`
`101`	`101`
`102`	`102`	`const htmlOut = stripForHtml(html)`
`103`	`103`	`const sfcOutputPath = rendered.outputPath`
Original file line number	Diff line number	Diff line change
`@@ -67,7 +67,7 @@ export async function render(`
`67`	`67`	`if (rendered.templateConfig.useTransformers !== false) {`
`68`	`68`	`html = await runTransformers(html, rendered.templateConfig, isFile ? resolve(template) : undefined, doctype, rendered.tailwindBlocks)`
`69`	`69`	`}`
`70`		- html = `${doctype}\n${html}`
	`70`	+ if (doctype) html = `${doctype}\n${html}`
`71`	`71`
`72`	`72`	`const globalPlaintext = rendered.templateConfig.plaintext`
`73`	`73`	`const sfcPlaintext = rendered.plaintext`