What does this in vue represent?

The this keyword in Vue points to the current Vue instance, which is a JavaScript object that encapsulates data, methods and life cycle hooks. Each Vue component corresponds to a Vue instance. this can be used to access instance data, call methods, access lifecycle hooks, and access Vue's built-in properties and methods.

#What does this in Vue stand for?

In Vue.js, the this keyword represents the current Vue instance.

Vue Instance

A Vue instance is a JavaScript object that encapsulates the data, methods, and lifecycle hooks of a Vue application. Each Vue component corresponds to a Vue instance.

this Purpose

this Keywords can be used to:

• Access instances The data
• Call the method of the instance
• Access the instance’s life cycle hook
• Access Vue The built-in properties and methods (e.g. $emit, $data)

Note:

• this always points to the instance of the current component in the Vue template.
• this can be used in JavaScript code and templates.
• When this is used in a nested component, it always points to the instance of the innermost component.

Example:

const app = new Vue({
  data() {
    return {
      message: 'Hello'
    }
  },
  methods: {
    logMessage() {
      console.log(this.message)
    }
  }
})

app.logMessage() // 输出 "Hello"

In this example, this is between methods and data points to the app instance, so this.logMessage() can access this.message data.

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