The grid-template-areas CSS property specifies named grid areas, which are not associated with any particular grid item, but can be referenced from the grid-placement properties.
object.style.gridTemplateAreas = "value";
<'grid-template-areas'> = none | <string>+
Indicates that no named grid areas, and likewise no explicit grid tracks, are defined by this property (though explicit grid tracks could still be created by grid-template-columns or grid-template-rows).
Specifies a sequence of characters delimited by double quotes (") or single quotes (').