Is there a way to span all columns when the number of columns is unknown?

[thinsoldier]

https://www.reddit.com/r/css/comments/6ssj1q/grid_css_question/

[rachelandrew]

This isn't an interoperability issue, as in an issue where a browser is acting in a way that does not reflect the spec.

https://github.com/rachelandrew/gridbugs#this-is-not-css-grid-technical-support