Added a CSS syntax and Example

guide/english/css/selectors/attribute/star/index.md

@@ -5,6 +5,14 @@ title: Star
 
 Star CSS attribute selector or * is used for selecting attributes that contain specific value.
 
+### CSS Syntax
+
+```css
+attribute *= value {
+    css declarations;
+}
+```
+
 #### Example
 
 If you want to search all anchor links that contain "code" anywhere in the URL value and make them yellow, you can do it like this:
@@ -15,3 +23,11 @@ a[href*="code"] {
 }
 ```
 
+Set a background color on all `<div>` elements that have a class attribute value containing "backing":
+   
+```css
+div[class*="backing"] {
+    background: #ffff00;
+}
+```
+