Select and style elements, where the lang attribute's value starts with "en":
More "Try it Yourself" examples below.
The [attribute|=value] selector is used to select elements with the specified attribute starting with the specified value.
Note: The value has to be a whole word, either alone, like lang="en", or followed by a hyphen( - ), like lang="en-us".
The numbers in the table specifies the first browser version that fully supports the selector.
Note: For [attribute|=value] to work in IE8 and earlier, a <!DOCTYPE> must be declared.
Select and style elements, where the class attribute's value starts with "top":
CSS tutorial: CSS Attribute Selectors