React

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 Characters extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
    data: {
    name: "Tommy Vercetti", location:'Vice City' 
    }
       
    }
  }
  
  removeKey = (keyname) => {    
    const updatedState = {
       data: {
       	name: 'Tommy Vercetti'
       }
    };
    
    this.setState(updatedState)
}
  
  render() {
    const { data } = this.state;   
    return (
      <div>
        <h2 onClick={() => this.removeKey('name')}>Characters:</h2>
        <ol>
         <li>{data.name}</li>
         <li>{data.location}</li>
        </ol>
      </div>
    )
  }
}

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