Method constructor

src/material/sidenav/drawer.ts:834–862

()

  private _injector = inject(Injector);

  constructor() {
    const platform = inject(Platform);
    const viewportRuler = inject(ViewportRuler);

    // If a `Dir` directive exists up the tree, listen direction changes
    // and update the left/right properties to point to the proper start/end.
    this._dir?.change.pipe(takeUntil(this._destroyed)).subscribe(() => {
      this._validateDrawers();
      this.updateContentMargins();
    });

    // Since the minimum width of the sidenav depends on the viewport width,
    // we need to recompute the margins if the viewport changes.
    viewportRuler
      .change()
      .pipe(takeUntil(this._destroyed))
      .subscribe(() => this.updateContentMargins());

    if (!this._animationDisabled && platform.isBrowser) {
      this._ngZone.runOutsideAngular(() => {
        // Enable the animations after a delay in order to skip
        // the initial transition if a drawer is open by default.
        setTimeout(() => {
          this._element.nativeElement.classList.add('mat-drawer-transition');
          this._transitionsEnabled = true;
        }, 200);
      });
    }
  }

  ngAfterContentInit() {
    this._allDrawers.changes