1 files changed, 19 insertions, 0 deletions
diff --git a/docs/index.md b/docs/index.md
index e187ffbe..63cf15e0 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -8,6 +8,25 @@ It allows you to write **templates**, using **variables**, **modifiers**, **func
 <p>
     The number of pixels is: {math equation="x * y" x=$height y=$width}.
 </p>
+
+<p>
+    {if $email matches "/^[^@]+@[^@]+\.[^@]+$/"}
+        Valid email address
+    {else}
+        Please enter a valid email
+    {/if}
+</p>
+```
+```html
+<h1>Hello world</h1>
+
+<p>
+    The number of pixels is: 307200.
+</p>
+
+<p>
+    Valid email address
+</p>
 ```
 
 When this template is rendered, with the value "Hello world" for the variable $title, 640 for $width,