Only use if masterminds/html5 is installed

MyIntervals · Jul 6, 2020 · 1bf6318 · 1bf6318
1 parent 725b49f
commit 1bf6318
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/composer.json b/composer.json
@@ -40,14 +40,16 @@
         "php": "~7.1.0 || ~7.2.0 || ~7.3.0 || ~7.4.0",
         "ext-dom": "*",
         "ext-libxml": "*",
-        "masterminds/html5": "^2.7",
         "symfony/css-selector": "^3.4.32 || ^4.3.5 || ^5.0"
     },
     "require-dev": {
         "php-parallel-lint/php-parallel-lint": "^1.2.0",
         "slevomat/coding-standard": "^4.0.0",
         "squizlabs/php_codesniffer": "^3.5.1"
     },
+    "suggest": {
+      "masterminds/html5": "Use instead of PHP's built-in DOMDocument for HTML5 support."
+    },
     "autoload": {
         "psr-4": {
             "Pelago\\Emogrifier\\": "src/"

diff --git a/src/HtmlProcessor/AbstractHtmlProcessor.php b/src/HtmlProcessor/AbstractHtmlProcessor.php
@@ -358,7 +358,8 @@ private function ensureExistenceOfBodyElement(): void
      */
     private function isHtml5(string $html): bool
     {
-        return \strspn($html, " \t\r\n") === \stripos($html, '<!doctype html>');
+        return \strspn($html, " \t\r\n") === \stripos($html, '<!doctype html>')
+            && class_exists(HTML5::class);
     }
 
     /**