Vue 生命周期挂钩

Vue 中的生命周期挂钩用于在 Vue 应用程序生命周期的不同阶段运行代码。

Lifecycle Hook	Description
beforeCreate	happens before all the other lifecycle hooks
created	the component is initialized, and we can access component instance properties
beforeMount	the component is not mounted yet, so we can not access DOM elements
mounted	the component is mounted to the DOM tree, so we can access DOM elements
beforeUpdate	happens when Vue's reactive system has detected a change that requires a new rendering
updated	happens right after the DOM tree has updated
beforeUnmount	happens just before a component is removed from the DOM
unmounted	happens after a component is removed from the DOM
errorCaptured	happens when an error happens in a child/descendant component
renderTracked	happens when a render function is set to track, or monitor, a reactive component
renderTriggered	happens when there is a change in a tracked reactive component, so that a new render is triggered
activated	happens when a cached dynamic component is added (but is already in the DOM)
deactivated	happens when a cached dynamic component is removed (but not from the DOM)
serverPrefetch	happens during server-side rendering (SSR)