Method _handleKeydown

src/material/menu/menu-trigger.ts:178–194

Handles key presses on the trigger.

(event: KeyboardEvent)

  /** Handles key presses on the trigger. */
  _handleKeydown(event: KeyboardEvent): void {
    const keyCode = event.keyCode;

    // Pressing enter on the trigger will trigger the click handler later.
    if (keyCode === ENTER || keyCode === SPACE) {
      this._openedBy = 'keyboard';
    }

    if (
      this.triggersSubmenu() &&
      ((keyCode === RIGHT_ARROW && this.dir === 'ltr') ||
        (keyCode === LEFT_ARROW && this.dir === 'rtl'))
    ) {
      this._openedBy = 'keyboard';
      this.openMenu();
    }
  }

  /** Handles click events on the trigger. */
  _handleClick(event: MouseEvent): void {