Vue introduces external function methods

Vue.js is a popular JavaScript framework for building interactive web applications. In Vue.js, we can easily introduce external methods and functions and bind them with Vue instances. This allows us to more flexibly extend Vue applications with richer functionality. This article will introduce how to introduce external function methods in Vue.js.

The steps to introduce external function methods in Vue.js are as follows:

1. Define external function methods

First, we need to define what we want to introduce External function methods. These methods can be modules introduced through import statements or functions defined in the global scope. For example, we can define a function named calculate in the following way:

function calculate(a, b) {
  return a + b;
}

2. Introducing the function into the Vue component

Vue.js Components are the basic building blocks of an application. We can introduce external function methods into Vue components. In the Vue component, we can introduce external functions through the import statement:

<script>
import { calculate } from './utils.js';

export default {
  name: 'my-component',
  data() {
    return {
      result: 0
    }
  },
  methods: {
    calculateResult() {
      this.result = calculate(2, 3);
    }
  }
}
</script>

In this example, we pass import {calculate} from './utils.js'# The ## statement introduces a function named calculate. Then we can use the calculate function in the method of the Vue component.

Register components in the Vue instance

In Vue.js, we need to register the components we define in the Vue instance to use them. We can register our Vue component into a Vue instance through the

components option:

<script>
import MyComponent from './MyComponent.vue';

export default {
  name: 'app',
  components: {
    'my-component': MyComponent
  }
}
</script>

In this example, we register a Vue component named

MyComponent Go to the Vue instance and use 'my-component' as the name of the component. In this way, we can use the b98f2d1b8b5d79f8c1b053de334aa7b5 tag in the Vue instance as the entry point of the component.

Using components

Now, we have introduced the external function method into the Vue component and registered the component into the Vue instance. We can use them by using components in Vue templates. For example, we can use a component in the

b98f2d1b8b5d79f8c1b053de334aa7b5 tag and call the calculate function in the component:

<my-component></my-component>

// MyComponent.vue
<template>
  <div>
    <button @click="calculateResult">Calculate</button>
    <p>Result: {{ result }}</p>
  </div>
</template>

<script>
// 引入我们的calculate函数
import { calculate } from './utils.js';

export default {
  name: 'my-component',
  data() {
    return {
      result: 0
    }
  },
  methods: {
    calculateResult() {
      this.result = calculate(2, 3);
    }
  }
}
</script>

In this example, we The

b98f2d1b8b5d79f8c1b053de334aa7b5 tag is used in the Vue template and a button is created in the component's template. When the user clicks the button, we call the calculateResult method and calculate the result using the calculate function. Then update the calculation result to the result property in the Vue component.

Summary

Introducing external function methods in Vue.js is a very simple process. We just need to import the functions into the Vue component and register them with the Vue instance. By using these external function methods, we can make our Vue application more flexible and extend the functionality of Vue at the same time.

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