portal-vue/src/layout/components/AppMain.vue

<template>
  <section class="app-main">
    <transition name="fade-transform" mode="out-in">
      <keep-alive :include="cachedViews">
        <router-view :key="key" />
      </keep-alive>
    </transition>
    <span class="footer">
      Copyright
    </span>
  </section>
</template>

<script>
export default {
  name: 'AppMain',
  computed: {
    cachedViews() {
      return this.$store.state.tagsView.cachedViews
    },
    key() {
      return this.$route.path
    }
  }
}
</script>

<style lang="scss" scoped>
@import "~@/styles/variables.scss";
.app-main {
  min-height: calc(100vh - #{$headerHeight});
  width: 100%;
  position: relative;
  overflow: auto;
  padding-bottom: $footerHeight;

  &>div:not(.home-container) {
    height: calc(100vh - #{$layoutHeight});
    padding: 10px 0 0 10px;
  }
}

.hasTagsView {
  .app-main {
    min-height: calc(100vh - #{$headerHeight} - #{$tagHeight});
  }

  .fixed-header+.app-main {
    min-height: calc(100vh - #{$headerHeight});
    padding-top: $tagHeight;
  }
}

.footer {
  display: block;
  width: 100%;
  height: $footerHeight;
  line-height: $footerHeight;
  font-size: 12px;
  color: rgba(0,0,0,0.45);
  text-align: center;
  position: absolute;
  left: 0;
  bottom: 0;
}
</style>

<style lang="scss">
// fix css style bug in open el-dialog
.el-popup-parent--hidden {
  .fixed-header {
    padding-right: 15px;
  }
}
</style>