CSS: Case Sensitivity

CSS Selector for HTML tag names

Case-Insensitive

div { color: red; }

is same as

DIV { color: red; }

CSS Selector for HTML attribute names

Case-Insensitive

div.abc { color: red; }

is same as

div.ABC { color: red; }

CSS Selector for HTML attribute values

Case-Sensitive

• CSS: attribute selector ([x])

/* color span tag with class name starting with abc.
Case-Sensitive
*/
span[class ^="abc"]