vue-lifecycle-vue生命周期

这里的vue生命周期指的是一个组件创建到销毁的过程。

当组件激活 触发beforeCreate，Create，beforeMount，Mount
当组件不再显示销毁时，触发beforeDestroy，Destroy

<div id="app">
  <h3>Let's check out the lifecycle of this hur' child.</h3>
  <h4>Check the console!</h4>
  <button @click="toggleShow">
    <span v-if="isShowing">Hide child</span>
    <span v-else>Show child</span>
  </button>
  <hr>
  <div v-if="isShowing">
    <app-child></app-child>
  </div>
</div>

<script type="text/x-template" id="childarea">
  <div>
  	<h4>Here I am!</h4>
  </div>
</script>

body {
  font-family: 'Bitter', serif;
}

#app {
  text-align: center;
  margin: 60px;
  max-width: 320px;
  margin: 0 auto;
  display: table;
}

.num {
  color: #AF007E;
}

button {
  font-family: 'Bitter';
  background: #c62735;
  color: white;
  border: 0;
  padding: 5px 15px;
  margin: 0 10px;
  border-radius: 4px;
  outline: 0;
  cursor: pointer;
}

h4 {
  margin: 0 0 15px;
}

hr {
  border-color: #F2FAFF;
  opacity: 0.5;
  margin: 15px 0;
}

const Child = {
  template: '#childarea',
  beforeCreate() {
    console.log("beforeCreate!");
  }, 
  created() {
    console.log("created!");
  }, 
  beforeMount() {
    console.log("beforeMount!");
  }, 
  mounted() {
    console.log("mounted!");
  }, 
  beforeDestroy() {
    console.log("beforeDestroy!");
  }, 
  destroyed() {
    console.log("destroyed!");
  }
};

new Vue({
  el: '#app',
  data() {
    return {
      isShowing: false 
    }
  },
  methods: {
    toggleShow() {
      this.isShowing = !this.isShowing;
    }
  },
  components: {
    appChild: Child
  }
});