SimpleCSSStyles contains all the style names that SimpleCSSStylesImpl is guaranteed to support. So I wouldn’t say fontWeight not being supported by SimpleCSSStylesImpl was a bug, unless it were added to SimpleCSSStyles.
I think if you want to be safe in MXML, it’s best to avoid using string values for style and to use objects such as SimpleCSSStyles insead. From: Justin Mclean<mailto:jus...@classsoftware.com> Sent: Sunday, March 5, 2017 12:33 PM To: dev@flex.apache.org<mailto:dev@flex.apache.org> Subject: Re: git commit: [flex-asjs] [refs/heads/develop] - Add JS support for non pixel numeric properties ie fontWeight Hi, > Again, with PAYG, we want SimpleCSSStylesImpl to be simple and we want the > SWF side to remain at parity. IMO this is not a PAYG issue it is a bug. FontWeight does accept px values see [1] Without this change any font weight values are ignored in JS and no warnings given. Thanks, Justin 1.https://www.w3.org/wiki/CSS/Properties/font-weight <https://www.w3.org/wiki/CSS/Properties/font-weight>