How to use composition API in Vue2.0?229

 How to use composition API in Vue2.0?

While the Composition API was officially introduced in Vue 3, you can leverage its features in Vue 2.0 projects by using a plugin called @vue/composition-api. Here's how to integrate it:

1. Installation:

• Install the plugin using npm or yarn:

Bash

npm install @vue/composition-api

2. Plugin Registration:

• Import and register the plugin in your main Vue application file (usually main.js or app.js):

JavaScript

import Vue from 'vue';
import VueCompositionAPI from '@vue/composition-api';

Vue.use(VueCompositionAPI);

3. Using Composition Features:

• Now you can access Composition API features within your Vue 2.0 components:

Code snippet

<template>
  </template>

<script>
import { ref, computed } from '@vue/composition-api';

export default {
  setup() {
    const count = ref(0);
    const doubledCount = computed(() => count.value * 2);

    const increment = () => {
      count.value++;
    };

    return {
      count,
      doubledCount,
      increment,
    };
  },
};
</script>

Key Points:

• The setup function serves as the entry point for composition logic, replacing options like data, computed, and methods.

• Use ref to create reactive variables, computed for computed properties, and other Composition API features as needed.

• Return the properties and functions you want to expose to the template from the setup function.

Remember:

• This plugin provides a compatibility layer, not a complete Vue 3 Composition API implementation.

• Certain features might not be available or behave exactly as in Vue 3.

• Consider potential trade-offs and compatibility concerns before using it in production environments.

• For a fully integrated Composition API experience, upgrading to Vue 3 is recommended.

I hope this helps! Feel free to ask if you have further questions.

Sources

1. https://github.com/ragokan/kogara