vue ------- judgment device is a mobile phone or pc-end

I need to determine when clicking on this link routing Jump is a mobile terminal or the pc

<router-link @click.native="isMobile" to="/resume" tag="h2">简历</router-link>

methods: {
    isMobile() {
      console.log("1234321");
      this.flag = navigator.userAgent.match(
/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i
      );
      console.log(this.flag);
    }
  }

Click the button to display the pc side:

Click the button to display the mobile terminal: