October 2019
CSS properties that became available in major browsers in October 2019.
grid-auto-columns
property
MDN DocumentBrowser Support
Chrome
v57+2017-03-09Edge
v16+2017-10-17Fallback
v12 - v79-ms-grid-columnsSafari
v10.1+2017-03-27Safari (iOS)
v10.3+2017-03-27Firefox
v70+2019-10-22
grid-auto-rows
property
MDN DocumentBrowser Support
Chrome
v57+2017-03-09Edge
v16+2017-10-17Fallback
v12 - v79-ms-grid-rowsSafari
v10.1+2017-03-27Safari (iOS)
v10.3+2017-03-27Firefox
v70+2019-10-22