🤖 This is an automatic issue report for Web IDL syntax error. 🤖

webidl2.js says:

Syntax error at line 6 in web-animations-2,15, since `interface AnimationTrigger`:
 CSSKeywordValue or DOMString) rangeStart = "normal";
                                          ^

Error: Unterminated attribute, expected ;

Please file an issue at https://github.com/saschanaz/webidl-updater/issues/new if you think this is invalid or should be enhanced.