Vue相关,vue父子组件生命周期执行顺序。

时间:2022-01-18 16:20:08

一、实例代码

父组件:

<template>
<div id="parent">
<child></child>
</div>
</template> <script>
import child from './components/child'
export default {
name: 'parent',
components: {
child
},
beforeCreate() {
console.log('I am parents beforeCreated');
},
created() {
console.log('I am parents created');
},
beforeMount() {
console.log('I am parents beforeMount');
},
mounted() {
console.log('I am parents mounted');
}
}
</script>

子组件:

<template>
<div class="child">
child
</div>
</template> <script>
export default {
name: 'child',
beforeCreate() {
console.log('I am child beforeCreated');
},
created() {
console.log('I am child created');
},
beforeMount() {
console.log('I am child beforeMount');
},
mounted() {
console.log('I am child mounted');
}
}
</script>

执行结果:

Vue相关,vue父子组件生命周期执行顺序。

二、结论

我们从而可以得出父子组件的执行顺序为:

  • 父组件beforeCreated
  • 父组件created
  • 父组件beforeMounted
  • 子组件beforeCreated
  • 子组件created
  • 子组件beforeMounted
  • 子组件mounted
  • 父组件mounted

注意:

  • 父组件的mounted是在最后执行的。
  • 因此在子组件的mounted中渲染父组件在mounted阶段请求的数据,是会无反应的。因为子组件mounted渲染数据会发生在父组件mounted请求数据之前。