vue-class-component

What is vue-class-component?

The vue-class-component package is a library that allows you to define Vue components using ES2015/ES6 class syntax. It provides a more structured and object-oriented approach to building Vue components, making it easier to manage and maintain complex applications.

What are vue-class-component's main functionalities?

Class-based Component Definition

This feature allows you to define Vue components using ES6 class syntax. The @Component decorator is used to mark a class as a Vue component.

import { Vue, Component } from 'vue-class-component';

@Component
class MyComponent extends Vue {
  message: string = 'Hello, world!';

  greet() {
    console.log(this.message);
  }
}

Lifecycle Hooks

You can define lifecycle hooks as methods within the class. This example shows how to use the created lifecycle hook.

import { Vue, Component } from 'vue-class-component';

@Component
class MyComponent extends Vue {
  created() {
    console.log('Component created');
  }
}

Computed Properties

Computed properties can be defined as getter methods within the class. This example demonstrates a computed property that concatenates first and last names.

import { Vue, Component } from 'vue-class-component';

@Component
class MyComponent extends Vue {
  firstName: string = 'John';
  lastName: string = 'Doe';

  get fullName() {
    return `${this.firstName} ${this.lastName}`;
  }
}

Watchers

Watchers can be defined using the @Watch decorator. This example shows how to watch for changes to the 'message' property.

import { Vue, Component, Watch } from 'vue-class-component';

@Component
class MyComponent extends Vue {
  message: string = 'Hello';

  @Watch('message')
  onMessageChanged(newValue: string, oldValue: string) {
    console.log(`Message changed from ${oldValue} to ${newValue}`);
  }
}

Other packages similar to vue-class-component

vue-property-decorator

The vue-property-decorator package extends vue-class-component by adding decorators for props, watch, emit, and more. It provides a more comprehensive set of tools for defining Vue components using TypeScript and class-style syntax.

vue-tsx-support

The vue-tsx-support package provides a way to write Vue components using TypeScript and JSX. It offers type safety and a more React-like development experience, which can be beneficial for developers familiar with React.

vue-decorator

The vue-decorator package is another library that provides decorators for Vue components. It is similar to vue-class-component but focuses more on providing a wide range of decorators for different Vue features.

README

vue-class-component

ECMAScript / TypeScript decorator for class-style Vue components.

Usage

Required: Babel with stage 1 transforms, or TypeScript 1.5+ (for decorators).

Note:

1. methods can be declared directly as class member methods.

2. Computed properties can be declared as class property accessors.

3. data, el and all Vue lifecycle hooks can be directly declared as class member methods as well, but you cannot invoke them on the instance itself. When declaring custom methods, you should avoid these reserved names.

4. For all other options, pass them to the decorator function.

import Component from 'vue-class-component'

@Component({
  props: {
    propMessage: String
  },
  template: `
    <div>
      <input v-model="msg">
      <p>prop: {{propMessage}}</p>
      <p>msg: {{msg}}</p>
      <p>computed msg: {{computedMsg}}</p>
      <button @click="greet">Greet</button>
    </div>
  `
})
class App {
  // return initial data
  data () {
    return {
      msg: 123
    }
  }

  // lifecycle hook
  ready () {
    this.greet()
  }

  // computed
  get computedMsg () {
    return 'computed ' + this.msg
  }

  // method
  greet () {
    alert('greeting: ' + this.msg)
  }
}

Build the Example

$ npm install && npm run build