How to use the @material/tab-indicator/foundation function in @material/tab-indicator

mounted() {
    this.adapter_ = {
      addClass: className => this.$set(this.classes, className, true),
      removeClass: className => this.$delete(this.classes, className),
      computeContentClientRect: () =>
        this.$refs.content.getBoundingClientRect(),
      setContentStyleProperty: (prop, value) => {
        this.$set(this.styles, prop, value);
      },
    };

    this.foundation = new MDCTabIndicatorFoundation(this.adapter_);
    this.foundation.init();
  },
  beforeDestroy() {