Vue2 的生命周期有哪些

一、生命周期与钩子函数

Vue的生命周期可以大致分为三个阶段：初始化组件实例阶段、更新组件实例阶段和销毁组件实例阶段。

<template>
  <div>
    <p>{{ message }}</p>
    <button @click="updateMessage">Update Message</button>
    <button @click="destroyComponent">Destroy Component</button>
  </div>
</template>
<script>
export default {
  data() {
    return {
      message: 'Hello Vue!'
    };
  },
  beforeCreate() {
    console.log('beforeCreate');
  },
  created() {
    console.log('created');
  },
  beforeMount() {
    console.log('beforeMount');
  },
  mounted() {
    console.log('mounted');
  },
  beforeUpdate() {
    console.log('beforeUpdate');
  },
  updated() {
    console.log('updated');
  },
  beforeDestroy() {
    console.log('beforeDestroy');
  },
  destroyed() {
    console.log('destroyed');
  },
  methods: {
    updateMessage() {
      this.message = 'Updated Message!';
    },
    destroyComponent() {
      this.$destroy(); // 手动销毁组件
    }
  }
};
</script>