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 App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      title: "React Simple CRUD Application",
      act: 0,
      index: "",
      datas: []
    };
  }

  componentDidMount() {
    this.refs.name.focus();
  }

  handleChange = e => {
    console.log(e.target.value);
  };

  fSubmit = e => {
    e.preventDefault();
    console.log("try");

    let datas = this.state.datas;
    let name = this.refs.name.value;
    let isenable = this.refs.isenable.checked;

    if (this.state.act === 0) {
      //new
      let data = {
        name,
        isenable
      };
      datas.push(data);
      console.log(data.isenable);
    } else {
      //update
      let index = this.state.index;
      datas[index].name = name;
      datas[index].isenable = isenable;
    }

    this.setState({
      datas: datas,
      act: 0
    });

    this.refs.myForm.reset();
    this.refs.name.focus();
  };

  fRemove = i => {
    let datas = this.state.datas;
    datas.splice(i, 1);
    this.setState({
      datas: datas
    });

    this.refs.myForm.reset();
    this.refs.name.focus();
  };

  fEdit = i => {
    let data = this.state.datas[i];
    this.refs.name.value = data.name;
    this.refs.isenable.checked = data.isenable;

    this.setState({
      act: 1,
      index: i
    });

    this.refs.name.focus();
  };

  render() {
    let datas = this.state.datas;
    return (
      <div className="App">
        <h2>{this.state.title}</h2>
        <form ref="myForm" className="myForm">
          <input
            type="text"
            ref="name"
            placeholder="your name"
            className="formField"
          />
          <input
            type="checkbox"
            ref="isenable"
            placeholder="your isenable"
            className="formField"
          />
          <button onClick={e => this.fSubmit(e)} className="myButton">
            submit
          </button>
        </form>
        <pre>
         ...