Function mouse_move

js/src/Mark.ts:555–562

()

  }

  mouse_move() {
    if (
      this.model.get('enable_hover') &&
      this.is_hover_element(d3.select(d3GetEvent().target))
    ) {
      this.move_tooltip();
    }
  }

  //TODO: Rename function
  is_hover_element(elem) {