How to use the @material/icon-button.MDCIconButtonToggle.attachTo function in @material/icon-button

update () {
      if ((this.isToggleButton || this.isToggleButtonViaSlots) && typeof this.mdcIconButtonToggle === 'undefined') {
        this.mdcIconButtonToggle = MDCIconButtonToggle.attachTo(this.$el)
        this.mdcIconButtonToggle.on = this.value
      }
      if (this.isIconButton && typeof this.mdcRipple === 'undefined') {
        this.mdcRipple = MDCRipple.attachTo(this.$el)
        this.mdcRipple.unbounded = true
      }
    }
  }