Add upperDoctype option

wooorm · wooorm · commit e7a5874d6050 · 2019-12-20T17:10:38.000+01:00
diff --git a/lib/doctype.js b/lib/doctype.js
@@ -2,13 +2,17 @@
 
 module.exports = doctype
 
+var docLower = 'doctype'
+var docUpper = docLower.toUpperCase()
+
 // Stringify a doctype `node`.
 function doctype(ctx, node) {
+  var doc = ctx.upperDoctype ? docUpper : docLower
   var sep = ctx.tightDoctype ? '' : ' '
   var name = node.name
   var pub = node.public
   var sys = node.system
-  var val = ['<!doctype']
+  var val = ['<!' + doc]
 
   if (name) {
     val.push(sep, name)
diff --git a/lib/index.js b/lib/index.js
@@ -40,6 +40,7 @@ function toHtml(node, options) {
       alternative: smart ? alternative : null,
       unquoted: Boolean(settings.preferUnquoted),
       tight: settings.tightAttributes,
+      upperDoctype: Boolean(settings.upperDoctype),
       tightDoctype: Boolean(settings.tightDoctype),
       tightLists: settings.tightCommaSeparatedLists,
       tightClose: settings.tightSelfClosing,
diff --git a/readme.md b/readme.md
@@ -70,6 +70,11 @@ Tag names of [*elements*][element] to stringify without closing tag
 
 Not used in the SVG space.
 
+###### `options.upperDoctype`
+
+Use an `<!DOCTYPE…` instead of `<!doctype…`.
+Useless except for XHTML (`boolean`, default: `false`).
+
 ###### `options.quote`
 
 Preferred quote to use (`'"'` or `'\''`, default: `'"'`).
diff --git a/test/doctype.js b/test/doctype.js
@@ -23,6 +23,12 @@ test('`text`', function(t) {
     'should stringify doctypes with `name` tightly in `tightDoctype` mode'
   )
 
+  t.deepEqual(
+    to(u('doctype', {name: 'html'}), {upperDoctype: true}),
+    '<!DOCTYPE html>',
+    'should stringify uppercase doctypes in `upperDoctype` mode'
+  )
+
   t.deepEqual(
     to(
       u('doctype', {
