add

• Description
• Syntax
• Examples
• Links

The add of DOMTokenList for JS adds all arguments passed, except those already present.

Throws a "SyntaxError" DOMException if one of the arguments is the empty string.

Throws an "InvalidCharacterError" DOMException if one of the arguments contains any ASCII whitespace.

tokenlist.add(tokens…)

A list of strings.

• contains
• item
• length
• remove
• replace
• supports
• toggle
• value

• Web Hypertext Application Technology Working Group (WHATWG)