Number of property warnings I'm unsure about

[s10wen]

Warning: word-spacing is not a known property https://developer.mozilla.org/en/docs/Web/CSS/word-spacing

Warning: pointer-events is not a known property https://developer.mozilla.org/en/docs/Web/CSS/pointer-events

There's more I found, wondering if there's a reason for these being picked up?

[fidian]

Are those officially defined in one of the CSS specs, or is it a Mozilla-only thing? Sorry, too flustered at work to look these up properly right now.

[s10wen]

On further investigation it seems word-spacing is:
https://www.w3.org/wiki/CSS/Properties/word-spacing
http://caniuse.com/#search=word-spacing

But pointer-events isn't, although it is widely supported:
http://caniuse.com/#search=pointer-events

Hope you sorted your flustering out :)

[udiboy1209]

Having this issue with the flex property: https://www.w3.org/TR/2016/CR-css-flexbox-1-20160301/

Is there a way to ignore such warnings only for the flex property?