vue2与vue3对比

本节目标：理解“vue2与vue3对比”的核心思路，并能把它用于实际开发或面试表达。

**一、生命周期****-vue2.0** **和****Vue3.0** **生命周期的区别**

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**Vue2**

**Vue3**

beforeCreate

setup

created

setup

beforeMount

onBeforeMount

mounted

onMounted

beforeUpdate

onBeforeUpdate

updated

onUpdated

beforeDestroy

onBeforeUnmount

destroyed

onUnmounted

activated

onActivated

deactivated

onDeactivated

注意： beforeDestroy和destroyed这两个生命周期已经废弃，代替对应的生命周期分别是beforeUnmount和unmouted