DOMTokenList
Represents a list of DOMTokens.
Gets an item in the list by its index.
Gets the number of tokens.
public DOMTokenList()
Creates a new list of tokens.
Adds token to the underlying string.
Returns true if the underlying string contains token, otherwise false.
Remove token from the underlying string.
Removes token from string and returns false. If token doesn't exist it's added and the function returns true.