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找到原因了，之前給router-view加了個(gè)keep-alive導(dǎo)致元件快取了，所以不會(huì)觸發(fā)beforeDestory和destoryed

我試了一下，切換路由的時(shí)候能觸發(fā)執(zhí)行beforeDestroy方法，範(fàn)例如下。

const Home = {
        template: `
      <p>
      <p class="section">Some section foo</p>
      <p class="section">Some section foo</p>
      <p class="section">Some section foo</p>
      <p class="section">Some section foo</p>
    </p>
  `,
        mounted() {
           console.log("Home mounted");
        },
        beforeDestroy() {
            console.log("Home destroy");
        }
    };

    const Test = {
        template: `
            <p>
              <p class="section">Some section test</p>
              <p class="section">Some section test</p>
              <p class="section">Some section test</p>
              <p class="section">Some section test</p>
            </p>
  `,
        mounted() {
            console.log("Test mounted");
        },
        beforeDestroy() {
            console.log("Test destroy");
        }
    };