web前端面试高频考点——Vue的高级特性（动态组件、异步加载、keep-alive、mixin、Vuex、Vue-Router）

<template>
  <div>
    <p>vue 高级特性-动态组件</p>
    <hr />
    <component :is="NextTick"></component>
  </div>
</template>
<script>
import NextTick from "./NextTick.vue";
export default {
  components: { NextTick },
  data() {
    return {
      NextTick
    };
  },
};
</script>

<template>
  <div>
    <p>vue 高级特性-动态组件</p>
    <hr />
    <div v-for="(val, key) in newsData" :key="key">
      <component :is="val.type"></component>
    </div>
  </div>
</template>
<script>
import myText from './myText'
import myImage from './myImage'
export default {
  components: {
    myText,
    myImage
  },
  data() {
    return {
      newsData: {
        1: {
          type: 'myText'
        },
        2: {
          type: 'myImage'
        }
      }
    };
  },
};
</script>

<template>
  <div>
    <p>我是 myText 组件</p>
    ---------------------
  </div>
</template>

<template>
  <div>
    <p>我是 myImage 组件</p>
    <img src="xxx">
  </div>
</template>

<template>
  <div>
    <my-image v-if="showImage" />
    <button @click="showImage = true">点我显示</button>
  </div>
</template>
<script>
export default {
  components: {
    myImage: () => import("./myImage"),
  },
  data() {
    return {
      showImage: false,
    };
  },
};
</script>

<template>
  <div>
    <p>我是 myImage 组件</p>
    <img src="xxx">
  </div>
</template>

<template>
  <div>
    <button @click="changeState('A')">A</button>
    <button @click="changeState('B')">B</button>
    <button @click="changeState('C')">C</button>
    <keep-alive>
      <keep-alive-state-a v-if="state === 'A'"></keep-alive-state-a>
      <keep-alive-state-b v-if="state === 'B'"></keep-alive-state-b>
      <keep-alive-state-c v-if="state === 'C'"></keep-alive-state-c>
    </keep-alive>
  </div>
</template>
<script>
import KeepAliveStateA from "./KeepAliveStateA.vue";
import KeepAliveStateB from "./KeepAliveStateB.vue";
import KeepAliveStateC from "./KeepAliveStateC.vue";
export default {
  components: {
    KeepAliveStateA,
    KeepAliveStateB,
    KeepAliveStateC,
  },
  data() {
    return {
      state: "A",
    };
  },
  methods: {
    changeState(state) {
      this.state = state;
    },
  },
};
</script>

<template>
  <div>
    <p>state A</p>
  </div>
</template>
<script>
export default {
  mounted() {
    console.log("A mounted");
  },
  destroyed() {
    console.log("A destroyed");
  },
};
</script>

<template>
  <div>
    <p>state B</p>
  </div>
</template>
<script>
export default {
  mounted() {
    console.log("B mounted");
  },
  destroyed() {
    console.log("B destroyed");
  },
};
</script>

<template>
  <div>
    <p>state C</p>
  </div>
</template>
<script>
export default {
  mounted() {
    console.log("C mounted");
  },
  destroyed() {
    console.log("C destroyed");
  },
};
</script>

<template>
  <div>
    <p>{{ name }} {{ major }} {{ city }}</p>
    <button @click="showName">显示姓名</button>
  </div>
</template>
<script>
import myMixin from "./mixin";
export default {
  mixins: [myMixin],
  data() {
    return {
      name: "杂货铺",
      major: "web 前端",
    };
  },
  mounted() {
    console.log("component mounted", this.name);
  },
};
</script>

export default {
  data() {
    return {
      city: "北京",
    };
  },
  methods: {
    showName() {
      console.log("点击显示名字：", this.name);
    },
  },
  mounted() {
    console.log("mixin mounted", this.name);
  },
};

const User = {
    // 获取参数，如 10 20
    template: '<div>User {{ $router.params.id }} </div>'
}
const router = new VueRouter({
    routes: [
        // 动态路径参数 以冒号开头。能命中 `/user/10` `/user/20` 等格式的路由
        {path: '/user/:id', component: User}
    ]
})

export default new VueRouter({
  routes: [
    {
      path: '/',
      component: () => import('./components/xxx')
    }
  ]
})