def _cached_var_name(self) -> str:
        """The name of the var.

        Returns:
            The name of the var.

        Raises:
            ValueError: If the slice step is zero.
        """
        start, end, step = self._start, self._stop, self._step

        normalized_start = (
            LiteralVar.create(start) if start is not None else Var(_js_expr="undefined")
        )
        normalized_end = (
            LiteralVar.create(end) if end is not None else Var(_js_expr="undefined")
        )
        if step is None:
            return f"{self._array!s}.slice({normalized_start!s}, {normalized_end!s})"
        if not isinstance(step, Var):
            if step < 0:
                actual_start = end + 1 if end is not None else 0
                actual_end = start + 1 if start is not None else self._array.length()
                return str(self._array[actual_start:actual_end].reverse()[::-step])
            if step == 0:
                msg = "slice step cannot be zero"
                raise ValueError(msg)
            return f"{self._array!s}.slice({normalized_start!s}, {normalized_end!s}).filter((_, i) => i % {step!s} === 0)"

        actual_start_reverse = end + 1 if end is not None else 0
        actual_end_reverse = start + 1 if start is not None else self._array.length()

        return f"{self.step!s} > 0 ? {self._array!s}.slice({normalized_start!s}, {normalized_end!s}).filter((_, i) => i % {step!s} === 0) : {self._array!s}.slice({actual_start_reverse!s}, {actual_end_reverse!s}).reverse().filter((_, i) => i % {-step!s} === 0)"
The name of the var.

        Returns:
            The name of the var.

        Raises:
            ValueError: If the slice step is zero.
        
reflex/vars/sequence.py