Method _allowFocusEscape

src/material/chips/chip-grid.ts:439–443

* Removes the `tabindex` from the chip grid and resets it back afterwards, allowing the * user to tab out of it. This prevents the grid from capturing focus and redirecting * it back to the first chip, creating a focus trap, if it user tries to tab away.

()

   * it back to the first chip, creating a focus trap, if it user tries to tab away.
   */
  protected override _allowFocusEscape() {
    if (!this._chipInput?.focused) {
      super._allowFocusEscape();
    }
  }

  /** Handles custom keyboard events. */
  override _handleKeydown(event: KeyboardEvent) {