What are the life cycles of vue in order?

Vue.js is a front-end development framework that uses some technologies to facilitate developers' work, including life cycle functions. The translation of life cycle means that during the running process of the application, the component will go through some methods provided by Vue.js. These methods are called life cycle functions.

The life cycle function of Vue.js is divided into 8 stages. These 8 stages are arranged in order as follows:

1. beforeCreate

Instancing Before Vue.js, beforeCreate was the first life cycle function to be called. At this point we can make some configurations in the component, but we cannot access the information in datadata because the component has not been initialized yet.

2. created

After the component is instantiated, the create hook function will be called. At this point, the component has been initialized and can access the data in data, making the data responsive through all types of operations. It is usually used to initialize component data, mount API interfaces, listen for events and other operations.

3. beforeMount

The beforeMount hook function will be called before the component mounts the real DOM. At this time, we can create instances, mount views, etc. in the component.

4. mounted

The mounted life cycle function is triggered after the component is mounted to the real DOM. At this point we can perform DOM operations and access all information on the DOM, and the component has been initially rendered.

5. beforeUpdate

Before the component information is updated, the beforeUpdate life cycle function will be called. This hook function is mainly used to prepare components before updating, such as collecting pre-update information, preparing for rendering, etc.

6. updated

When the component data changes and has been re-rendered to the view, the updated life cycle function will be triggered. This cycle is a cycle after the data rendering snapshot, and can perform some data processing operations, such as format conversion, screening, etc.

7. beforeDestroy

At the end of the life cycle, the beforeDestroy life cycle function will be called. At this point we can do some cleanup work and collect component-related information.

8. destroyed

After the component is uninstalled, the destroy hook function will be called. At this time, we can clean and destroy resources such as timers and websockets in the component.

Summary: In the life cycle function of Vue.js, each hook function has its own corresponding operation, which can facilitate us to control the initialization, update, destruction and other processes of the component. This article analyzes each stage of the Vue.js life cycle function and their corresponding functions, hoping to help ECMAScript developers better understand the operation of Vue.js and thus make better use of Vue.js.

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