I've a question on implementing SLDS in lightning apps and commponents. I was going through a tutorial where I saw the instructor is installing slds unmanaged package and then referring the static resource using ltng:require on the app like
<aura:application> <ltng:require styles="/resource/slds100/......." </aura:application>
On trailhead I don't see anything like that and all they say is to use extends="force:slds" on the app as below -
<aura:application extends="force:slds"> <c:AccountCmpTest /> </aura:application>
I'm currently using this and it's working, so is this the correct approach or we still have to associate the ltng:require tag?