In Vue.js, the this keyword refers to the current component instance, which is used to access component data, methods, and properties, and is limited to the scope of the component itself.
Usage of this in Vue.js
What is this? The
this
keyword refers to the current component instance in Vue.js. It provides access to component data, methods and properties.
Usage of this
this
can be used for the following purposes:
1. Access data
this.data.message
2. Call the method
this.methods.greet()
3. Access the calculated property
this.computed.fullName
4. Access the listener Device
this.$listeners.input
5. Access the slot
this.$scopedSlots.default
6. Access the parent or root component
this.$parent this.$root## The scope of
#this
the scope of this is limited to the current component instance. This means it is not accessible from other components or from the global context.
Best Practices
- Avoid using
- this
directly in templates as it may make the code difficult to maintain and debug.
Instead, define a computed property or method to expose the required component state. - Use arrow functions in Methoden to ensure that
- this
always refers to the correct component instance.
Other notes
- In the Vuex store,
- this
refers to the store itself, not the one being used components.
In the event handler function, - this
refers to the event target, not the component instance.
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