[css-animation-1] Error handling for invalid CSSKeyframesRule.name

[cdoublev]

There is no error handling for declaring an invalid CSSKeyframesRule.name, defined as:

attribute CSSOMString name

name, of type CSSOMString: This attribute is the name of the keyframes, used by the animation-name property.

I suggest to define the same behavior as for declaring an invalid CSSKeyframeRule.keyText: If name is updated with an invalid <keyframes-name>, a SyntaxError exception must be thrown and the value of name must remain unchanged.

EDIT: after reading #2435, related issues/PRs, and testing current browsers output, noting that @keyframes initial {} is valid in Chrome but not @keyframes "initial" {}, etc... the absence of error handling seems to be expected because CSSKeyframesRule.name is expected to be serialized as a string (with quotes) when it is not a valid <custom-ident> | <string> , therefore I close this issue.