Batch Operation using pnp

private BatcOperation():void

{

let batchResults = [];

let batch=pnp.sp.createBatch();

pnp.sp.web.lists.getByTitle("Test").items.inBatch(batch).add({Title:"1"})

.then(function(response){

console.log(1);

batchResults.push(response);

});

pnp.sp.web.lists.getByTitle("Test").items.inBatch(batch).add({Title:"2"})

.then(function(response){

console.log(2);

batchResults.push(response);

});;

pnp.sp.web.lists.getByTitle("Test").items.inBatch(batch).add({Title:"3"})

.then(function(response){

console.log(3);

batchResults.push(response);

});;

pnp.sp.web.lists.getByTitle("Test").items.inBatch(batch).add({Title:"4"})

.then(function(response){

console.log(4);

batchResults.push(response);

});;

batch.execute().then(function(){

console.log("Final");

console.log(batchResults);

}).catch(function(exception){

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

});

}