The library now works the same way as DomDocument when loadHTML() is not called.

ivopetkov · ivopetkov · commit 667e4504c73a · 2020-11-09T10:57:17.000+02:00
diff --git a/src/HTML5DOMDocument.php b/src/HTML5DOMDocument.php
@@ -288,10 +288,6 @@ private function addBodyElementIfMissing(): bool
      */
     public function saveHTML(\DOMNode $node = null): string
     {
-        if (!$this->loaded) {
-            return '<!DOCTYPE html>';
-        }
-
         $nodeMode = $node !== null;
         if ($nodeMode && $node instanceof \DOMDocument) {
             $nodeMode = false;
diff --git a/tests/Test.php b/tests/Test.php
@@ -42,7 +42,7 @@ public function testSaveHTML()
 
         $dom = new HTML5DOMDocument();
         // without loading anything
-        $this->assertTrue('<!DOCTYPE html>' === $dom->saveHTML());
+        $this->assertTrue('' === $dom->saveHTML());
     }
 
     /**
@@ -1465,4 +1465,15 @@ public function testInternalEntityFromGetters(string $dom, string $expectedFromP
             static::assertEquals($expectedFromGetter, $node->getTextContent());
         }
     }
+
+    /**
+     *
+     */
+    public function testSaveHTMLWithoutLoadHTML()
+    {
+        $dom = new \IvoPetkov\HTML5DOMDocument();
+        $dom->appendChild($dom->createElement('div'));
+        $dom->querySelector('*')->innerHTML = 'text';
+        $this->assertEquals('<div>text</div>', $dom->saveHTML());
+    }
 }

Original file line number	Diff line number	Diff line change
`@@ -42,7 +42,7 @@ public function testSaveHTML()`
`42`	`42`
`43`	`43`	`$dom = new HTML5DOMDocument();`
`44`	`44`	`// without loading anything`
`45`		`- $this->assertTrue('<!DOCTYPE html>' === $dom->saveHTML());`
	`45`	`+ $this->assertTrue('' === $dom->saveHTML());`
`46`	`46`	`}`
`47`	`47`
`48`	`48`	`/**`
`@@ -1465,4 +1465,15 @@ public function testInternalEntityFromGetters(string $dom, string $expectedFromP`
`1465`	`1465`	`static::assertEquals($expectedFromGetter, $node->getTextContent());`
`1466`	`1466`	`}`
`1467`	`1467`	`}`
	`1468`	`+`
	`1469`	`+ /**`
	`1470`	`+ *`
	`1471`	`+ */`
	`1472`	`+ public function testSaveHTMLWithoutLoadHTML()`
	`1473`	`+ {`
	`1474`	`+ $dom = new \IvoPetkov\HTML5DOMDocument();`
	`1475`	`+ $dom->appendChild($dom->createElement('div'));`
	`1476`	`+ $dom->querySelector('*')->innerHTML = 'text';`
	`1477`	`+ $this->assertEquals('<div>text</div>', $dom->saveHTML());`
	`1478`	`+ }`
`1468`	`1479`	`}`