React

by nadundr

HTML

<div id="app"></div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

.done {
  color: rgba(0, 0, 0, 0.3);
  text-decoration: line-through;
}

input {
  margin-right: 5px;
}

React

class Test {
  constructor(){
    this.obj = {}
  }

  testFunc(){
    this.obj.one = 'two';
  }
}


class TodoApp extends React.Component {
  constructor(){
    super()
    this.testClass = new Test()
  }

  componentDidMount(){
    this.testClass.testFunc()
    // this returns undefined
    console.log('this is the other calss value:',this.testClass.obj.one)
  }
  
  render() {
  return <div >Sample App</div>;
  }
}

ReactDOM.render(<TodoApp />, document.querySelector("#app"))