Create list item using CSOM

sp-csom.js

function createItemCSOM(listName){
	var context = SP.ClientContext.get_current(); //gets the current context
	var web = context.get_web();
	var list = web.get_lists();
  var targetList = list.getByTitle(listName);
  var listItemCreation = new SP.ListItemCreationInformation();
  var newItem = targetList.addItem(listItemCreation);
  newItem.set_item("owner",SP.FieldUserValue.fromUser('alias@domain.com'));
  newItem.update();
  context.load(newItem);
  context.executeQueryAsync(function(){
  	console.log("Newly created item ID"+newItem.get_id());}, 
  function(){
  	console.log("Something went wrong");
  });
};

function ItemCreationFail(sender, args){
	console.log(args.get_message());
};