supports

• Description
• Syntax
• Examples
• Links

The supports of DOMTokenList for JS returns true if token is in the associated attribute’s supported tokens. Returns false otherwise.

Throws a TypeError if the associated attribute has no supported tokens defined.

tokenlist.supports(token)

A string.

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

• Web Hypertext Application Technology Working Group (WHATWG)