Method _toggleClasses

src/cdk/overlay/overlay-ref.ts:514–520

Toggles a single CSS class or an array of classes on an element.

(element: HTMLElement, cssClasses: string | string[], isAdd: boolean)

  /** Toggles a single CSS class or an array of classes on an element. */
  private _toggleClasses(element: HTMLElement, cssClasses: string | string[], isAdd: boolean) {
    const classes = coerceArray(cssClasses || []).filter(c => !!c);

    if (classes.length) {
      isAdd ? element.classList.add(...classes) : element.classList.remove(...classes);
    }
  }

  /** Detaches the overlay once the content finishes animating and is removed from the DOM. */
  private _detachContentWhenEmpty() {