Flexipage Region Info
lightning:flexipageRegionInfo
Provides Lightning page region information to the component that contains it.
For Use In
Lightning Experience, Salesforce Mobile App
The lightning:flexipageRegionInfo component provides Lightning page region information to the component that contains it. It passes the width of the region that the component is dropped into in the Lightning App Builder. For more information, see Make Your Lightning Page Components Width Aware With lightning:flexipageRegionInfo.