fix: blurry_image error without width (#77)

* fix: blurry_image error without width

Fixes an error when using blurry_image without specifying a width

* docs: improve examples of blurry_image

blurry/plugins/jinja_plugins/blurry_image_extension.py

@@ -19,7 +19,12 @@ class BlurryImage(StandaloneTag):
     tags = {"blurry_image"}
 
     def render(self, *args, **kwargs):
-        (image_url, width) = args
+        if len(args) == 2:
+            (image_url, width) = args
+        else:
+            image_url = args[0]
+            width = None
+
         image_content_path: str = "." + urlparse(image_url).path
         image_path = get_build_directory() / image_content_path
 

docs/content/templates/syntax.md

@@ -62,11 +62,11 @@ It does a few things:
 Basic example:
 
 ```jinja
-{% blurry_image page.thumbnailUrl, alt="Image description" %}
+{% blurry_image page.image, alt=page.name + " image" %}
 ```
 
 Example with explicit width (image with this width must be present in the build folder):
 
 ```jinja
-{% blurry_image page.thumbnailUrl, 250, id="image-id", class="responsive-image", loading="lazy" %}
+{% blurry_image page.image, 250, alt=page.name + " image", id="image-id", class="responsive-image", loading="lazy" %}
 ```