Method _toggleClass

packages/common/src/directives/ng_class.ts:180–198

(klass: string, enabled: boolean)

  }

  private _toggleClass(klass: string, enabled: boolean): void {
    if (ngDevMode) {
      if (typeof klass !== 'string') {
        throw new Error(
          `NgClass can only toggle CSS classes expressed as strings, got ${stringify(klass)}`,
        );
      }
    }
    klass = klass.trim();
    if (klass.length > 0) {
      klass.split(WS_REGEXP).forEach((klass) => {
        if (enabled) {
          this._renderer.addClass(this._ngEl.nativeElement, klass);
        } else {
          this._renderer.removeClass(this._ngEl.nativeElement, klass);
        }
      });
    }
  }
}