Method _handleOverlayKeydown

src/material/select/select.ts:983–992

Handles keyboard events coming from the overlay.

(event: KeyboardEvent)

  /** Handles keyboard events coming from the overlay. */
  protected _handleOverlayKeydown(event: KeyboardEvent): void {
    // TODO(crisbeto): prior to #30363 this was being handled inside the overlay directive, but we
    // need control over the animation timing so we do it manually. We should remove the `keydown`
    // listener from `.mat-mdc-select-panel` and handle all the events here. That may cause
    // further test breakages so it's left for a follow-up.
    if (event.keyCode === ESCAPE && !hasModifierKey(event)) {
      event.preventDefault();
      this.close();
    }
  }

  _onFocus() {
    if (!this.disabled) {