'this' is undefined inside function(). angular 2 [duplicate]

Answer 1

Use an arrow function...

declare var UIkit:any;

deleteData(dataArr): void {

  UIkit.modal.confirm('Are you sure you want to delete this?', () => {

    console.log(this);
    // [...]
  });
}

Check out MDN: Arrow functions for details on the matter.

An arrow function does not create its own this context, so this has its original meaning from the enclosing context.

Answer 2

'this' is not passed to your function scope, try

declare var UIkit:any;

deleteData(dataArr): void {
var that = this;
UIkit.modal.confirm('Are you sure you want to delete this?', function(){
  console.log(dataArr);
  console.log(that);
  //use service here...
  UIkit.modal.alert('Confirmed!');  
});
}