How to use the @material/dialog.MDCDialog.attachTo function in @material/dialog

mounted () {
    this.mdcDialog = MDCDialog.attachTo(this.$el)
    this.mdcDialog.autoStackButtons = this.stacked
    this.mdcDialog.escapeKeyAction = this.escapeKeyAction
    this.mdcDialog.scrimClickAction = this.scrimClickAction

    this.slotObserver = new MutationObserver(() => this.updateSlots())
    this.slotObserver.observe(this.$el, {
      childList: true,
      subtree: true
    })
    this.updateSlots()
  },
  beforeDestroy () {