Where does this in vue point to?

The this pointer in Vue depends on the context, usually pointing to the component instance (within the component) or the Vue instance (non-component context). Specific situations include: html templates, component methods, non-component functions, event handling functions, watch options, etc.

this in Vue points to

Vue, and the direction ofthisdepends on its The specifics of the context. It may point to a different object, for example:

• Component instance: Inside a component,thispoints to the component instance itself. This means you can access the component's data, methods, and properties.
• Vue instance: In a non-component context,thispoints to a Vue instance. A Vue instance represents the entire Vue application, providing global state management and event handling.

Specific points

The following are some specific situationsthispoints to:

• htmlIn the template:thispoints to the component instance.
• in the component method:thispoints to the component instance.
• In non-component functions:thispoints to the Vue instance.
• In event handling function:thispoints to the component instance of the event target (if the target is a component).
• watchOptions:thispoints to the Vue instance.

Examples

Here are a few examples showing wherethispoints in different contexts:

// 组件中 this.name = 'John'; // 指向组件实例 // 非组件函数中 this.$store.dispatch('action'); // 指向 Vue 实例 // 事件处理函数中 this.$el.classList.add('active'); // 指向事件目标的组件实例

It should be noted that the pointing ofthiscan be changed through techniques such asbindorarrow function. But in general, the rules listed above apply tothisin Vue.

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