如何在方法Renderer2.addClass()上添加多个类?
示例:
this.renderer.addClass(this.el.nativeElement, 'btn btn-primary')
[尝试这样做时出现错误:
ERROR DOMException: Failed to execute 'add' on 'DOMTokenList': The token provided ('btn btn-primary') contains HTML space characters, which are not valid in tokens.
at EmulatedEncapsulationDomRenderer2.addClass