A CSS property that arrived in Safari in March already has a new name. Safari 27.2 , which Apple’s WebKit team detailed Monday, switches Grid Lanes from flow-tolerance to fit-tolerance after the CSS Working Group decided the new name better describes what the property does.

The old name will keep working for now as a deprecated alias. “Be sure to update your code soon,” Jen Simmons wrote in the WebKit post, adding that Safari Web Inspector can mark what needs to be changed.

Select menus get a styling shortcut

The other change is in Customizable Select, which first landed in Safari 27.0. It added a <selectedcontent> element for more control over what the select button displays, though developers aren’t required to use it. Safari 27.2 adds a ::field-content pseudo-element that styles the text of the selected option on the page without that element.

WebKit also adjusted several default styles for appearance: base-select .…