SiteGroups using pnp

private GetSPSiteGroup():void

{

pnp.sp.web.siteGroups.get().then(function(response)

{

console.log(response);

for(let index:number=0;index<response.length;index++)

{

console.log("Title :"+response[index].Title);

}

}).catch(function(exception)

{

alert("Something went wrong :"+exception);

});

}