Merge branch 'feature/138' into develop

Close #138

Author: weierophinney

CHANGELOG.md

@@ -9,6 +9,10 @@ All notable changes to this project will be documented in this file, in reverse
 - [#135](https://github.com/zendframework/zend-view/pull/135) adds support
   for PHP 7.2.
 
+- [#138](https://github.com/zendframework/zend-view/pull/138) adds support for
+  the HTML5 "as" attribute to the `HeadLink` helper. This can be used to help
+  prioritize resource loading.
+
 ### Changed
 
 - [#133](https://github.com/zendframework/zend-view/pull/133) modifies the

src/Helper/HeadLink.php

@@ -51,7 +51,8 @@ class HeadLink extends Placeholder\Container\AbstractStandalone
         'extras',
         'itemprop',
         'crossorigin',
-        'integrity'
+        'integrity',
+        'as',
     ];
 
     /**

test/Helper/HeadLinkTest.php

@@ -457,4 +457,10 @@ public function testItempropAttributeIsSupported()
         $this->helper->prependAlternate(['itemprop' => 'url', 'href' => '/bar/baz', 'rel' => 'canonical']);
         $this->assertContains('itemprop="url"', $this->helper->toString());
     }
+
+    public function testAsAttributeIsSupported()
+    {
+        $this->helper->headLink(['as' => 'style', 'href' => '/foo/bar.css', 'rel' => 'preload']);
+        $this->assertContains('as="style"', $this->helper->toString());
+    }
 }