Extend HtmlImage by loading parameter.

README.md

@@ -166,7 +166,7 @@ Instances of `HtmlElementUniversalAbstract`, such as achor, break, button, div,
 
 `getId()`, `setId($id)`, `getClass()`, `setClass($class)`, `getStyle()`, `setStyle($style)`, `getTitle()`, `setTitle($title)`, `getOnClick()`, `setOnClick($event)`, `getOnDoubleClick()`, `setOnDoubleClick($event)`, `getOnMouseDown()`, `setOnMouseDown($event)`, `getOnMouseUp()`, `setOnMouseUp($event)`, `getOnMouseOver()`, `setOnMouseOver($event)`, `getOnMouseMove()`, `setOnMouseMove($event)`, `getOnMouseOut()`, `setOnMouseOut($event)`, `getOnKeyPress()`, `setOnKeyPress($event)`, `getOnKeyDown()`, `setOnKeyDown($event)`, `getOnKeyUp()`, `setOnKeyUp($event)`
 
-Some html elements also have special getter-/setter-methodes to access and modify attributes. For Example anchor (href, target, name, onblur, onfocus), button (type, name, value, tabindex, disabled, onblur, onfocus), image (src, alt, width, height), meta (name), label (for), form (action, method, target, enctype, autocomplete, onreset, onsubmit), input (type, name, disabled, readonly, onblur, onchange, onfocus).
+Some html elements also have special getter-/setter-methodes to access and modify attributes. For Example anchor (href, target, name, onblur, onfocus), button (type, name, value, tabindex, disabled, onblur, onfocus), image (src, alt, width, height, loading), meta (name), label (for), form (action, method, target, enctype, autocomplete, onreset, onsubmit), input (type, name, disabled, readonly, onblur, onchange, onfocus).
 
 
 ### Nested elements

src/HtmlImage.php

@@ -116,4 +116,27 @@ public function setHeight($height)
         }
         return $this;
     }
-}
+
+    /**
+     * @return string
+     */
+    public function getLoading()
+    {
+        return $this->getAttribute('loading');
+    }
+
+    /**
+     * @param string $loading
+     * @return HtmlImage
+     */
+    public function setLoading($loading)
+    {
+        if ($loading === 'eager' || $loading === 'lazy') {
+            $this->setAttribute('loading', $loading);
+        } else {
+            $this->setAttribute('loading', null);
+        }
+
+        return $this;
+    }
+}

tests/HtmlImageTest.php

@@ -90,4 +90,26 @@ public function testSetClass()
         $htmlElementObject->setClass('testClass');
         $this->assertEquals('<img src="' . $src . '" class="testClass" />', $htmlBuilder->render($htmlElementObject));
     }
+
+    public function testSetLoading()
+    {
+        $htmlBuilder = new HtmlBuilder();
+
+        $src = 'foo.png';
+
+        $htmlElementObject = new HtmlImage($src);
+        $htmlElementObject->setLoading('eager');
+        $this->assertEquals('<img src="' . $src . '" loading="eager" />', $htmlBuilder->render($htmlElementObject));
+    }
+
+    public function testSetLoadingWithWrongValue()
+    {
+        $htmlBuilder = new HtmlBuilder();
+
+        $src = 'foo.png';
+
+        $htmlElementObject = new HtmlImage($src);
+        $htmlElementObject->setLoading('xyz');
+        $this->assertEquals('<img src="' . $src . ' />', $htmlBuilder->render($htmlElementObject));
+    }
 }