Build Vue-like components in React. Get the goodness of Vue-reactivty system such as watchers and computed properties and remove the need of using React's setState completely.
$ npm install --save react-vue-component
- 
import {Component} from "react-vue-component"; class App extends Component { state = { name: "Bob", } componentDidMount() { this.name = "Albert"; } watch { name(newName, oldName) { console.log("name has changed!"); }, } computed { fullName(){ return this.name + " Lolzer"; } } methods { changeName() { // Changing name will also change the computed property fullName this.name = "John"; } } render() { // states, methods, and computed properties can be accessed directly via `this` just like in Vue const {name, fullName, changeName} = this; return ( <div> <p>{name}</p> <p>{fullName}</p> <a onClick={() => this.changeName()}>Change my name</a> </div> ) } } 
- In Vue, in order to "reactively" add/delete key-value pairs from an object, you will need to use  set(obj, key, value)anddelete(obj,key)respectively.
import {Component} from "react-vue-component";
class App extends Component {
  state = {
      obj : {
          name: "Prev"
      }
  }
  methods {
      addToObj() {
          this.set(this.obj, "age", 20); 
      }
      deleteName() {
          this.delete(this.obj, "name");
      }
  }
  watch {
      // nested watchers
      "obj.name" : (newName, oldName) => {
          console.log("Obj.name has changed");
      }
      "obj.age" : (newAge, oldAge) => {
          console.log("Obj.age has changed");
      }
  }
  render() {
      const {obj} = this;
      return (
          <div>
              Object.keys(obj).map(key => 
                  <p><strong>{key}</strong>: {obj[key]}</p>
              ) 
            <a onClick={() => this.addToObj()}>Add new key</a>
            <a onClick={() => this.deleteName()}>Delete name</a>
          </div>
      )
  }
}- 
Behind the scenes, componentWillMountis being used to inject Vue's reactivity system thus it is made impossible to overwrite. Instead, usebeforeMountas an equivalent replacement:
- 
import {Component} from "react-vue-component"; class App extends Component { beforeMount(){ console.log("before mount! component hasnt render yet...") } ... } 
- All credits to the Vue core team for their awesome reactivity system.