<button onclick={(function(event){
    console.log(this.event)
}).bind(this)}>
Save
</button>

class Mouse extends React.Component {
  render() {
    return <div>
      <div
        style={{border: '1px solid red'}}
        onMouseOverCapture={((event)=>{
          console.log('mouse over on capture event')
          console.dir(event, this)}).bind(this)}
        onMouseOver={((event)=>{
          console.log('mouse over on bubbling event')
          console.dir(event, this)}).bind(this)} >
          Open DevTools and move your mouse cursor over here
        </div>
    </div>
  }
}

class Mouse extends React.Component {
  render() {
    return <div>
      <div
        style={{border: '1px solid red'}}
        onMouseOver={((event)=>{
          console.log('mouse is over with event')
          console.dir(event)}).bind(this)} >
          Open DevTools and move your mouse cursor over here
        </div>
    </div>
  }
}

class Content extends React.Component {
  constructor(props) {
    super(props)
    this.state = {counter: 0}
  }
  handleClick(event) {
    this.setState({counter: ++this.state.counter})
  }
  render() {
    return (
      <div>
        <button
          onClick={this.handleClick.bind(this)}
          className="btn btn-primary">
          Don't click me {this.state.counter} times!
        </button>
      </div>
    )
  }
}

class ClickCounterButton extends React.Component {
  render() {
    return <button
      onClick={this.props.handler}
      className="btn btn-danger">
      Increase Volume (Current volume is {this.props.counter})
    </button>
  }
}

class ClickCounterButton extends React.Component {
  render() {
    return <button
      onClick={this.props.handler}
      className="btn btn-info">
      Don't touch me with your dirty hands!
    </button>
  }
}

class Content extends React.Component {
  constructor(props) {
    super(props)
    this.handleClick = this.handleClick.bind(this)
    this.state = {counter: 0}
  }
  handleClick(event) {
    this.setState({counter: ++this.state.counter})
  }
  render() {
    return (
      <div>
        <ClickCounterButton handler={this.handleClick}/>
        <br/>
        <Counter value={this.state.counter}/>
      </div>
    )
  }
}

class Radio extends React.Component {
  constructor(props) {
    super(props)
    this.handleResize = this.handleResize.bind(this)
    let order = props.order
    let i = 1
    this.state = {
      outerStyle: this.getStyle(4, i),
      innerStyle: this.getStyle(1, i),
      selectedStyle: this.getStyle(2, i),
      taggerStyle: {top: order*20, width: 25, height: 25}
    }
  }
  getStyle(i, m) {
    let value = i*m
    return {
      top: value,
      bottom: value,
      left: value,
      right: value,
    }
  }
  componentDidMount() {
    window.addEventListener('resize', this.handleResize)
  }
  componentWillUnmount() {
    window.removeEventListener('resize', this.handleResize)
  }
  handleResize(event) {
    let w = 1+ Math.round(window.innerWidth / 300)
    this.setState({
      taggerStyle: {top: this.props.order*w*10, width: w*10, height: w*10},
      textStyle: {left: w*13, fontSize: 7*w}
    })
  }
  render() {
    return <div>
      <div className="radio-tagger" style={this.state.taggerStyle}>
        <input type="radio" name={this.props.name} id={this.props.id}>
        </input>
        <label htmlFor={this.props.id}>
          <div className="radio-text" style={this.state.textStyle}>{this.props.label}</div>
          <div className="radio-outer" style={this.state.outerStyle}>
            <div className="radio-inner" style={this.state.innerStyle}>
              <div className="radio-selected" style={this.state.selectedStyle}>
              </div>
            </div>
          </div>
        </label>
      </div>
    </div>
  }
}

class SliderButtons extends React.Component {
  constructor(props) {
    super(props)
    this.state = {sliderValue: 0}
    this.handleSlide = this.handleSlide.bind(this)
    this.handleChange = this.handleChange.bind(this)
  }
  handleSlide(event, ui) {
    this.setState({sliderValue: ui.value})
  }
  handleChange(value) {
    return ()=> {
      $('#slider').slider('value', this.state.sliderValue + value)
      this.setState({sliderValue: this.state.sliderValue + value})
    }
  }
  componentDidMount() {
    $('#slider').on('slide', this.handleSlide)
  }
  componentWillUnmount() {
    $('#slider').off('slide', this.handleSlide)
  }
  render() {
    return <div>
      <button disabled={(this.state.sliderValue<1) ? true : false}
        className="btn default-btn"
        onClick={this.handleChange(-1)}>
          1 Less ({this.state.sliderValue - 1})
      </button>
      <button disabled={(this.state.sliderValue>99) ? true : false}
        className="btn default-btn"
        onClick={this.handleChange(1)}>
          1 More ({this.state.sliderValue + 1})
      </button>
    </div>
  }
}

class SliderValue extends React.Component {
  constructor(props) {
    super(props)
    this.handleSlide = this.handleSlide.bind(this)
    this.state = {sliderValue: 0}
  }
  handleSlide(event) {
    this.setState({sliderValue: event.detail.ui.value})
  }
  componentDidMount() {
    window.addEventListener('slide', this.handleSlide)
  }
  componentWillUnmount() {
    window.removeEventListener('slide', this.handleSlide)
  }
  render() {
    return <div className="" >
      Value: {this.state.sliderValue}
    </div>
  }
}

class Content extends React.Component {
    componentWillMount(){
        console.log(ReactDOM.findDOMNode(this)) // DOM 노드가 null
    }
    componentDidMount(){
        console.dir(ReactDOM.findDOMNode(this)) // DOM 노드가 <div>
    }
    render(){
        return()
    }
}

class Logger extends React.Component {
  constructor(props) {
    super(props)
    console.log('constructor')
  }
  componentWillMount() {
    console.log('componentWillMount is triggered')
  }
  componentDidMount(e) {
    console.log('componentDidMount is triggered')
    console.log('DOM node: ', ReactDOM.findDOMNode(this))
  }
  componentWillReceiveProps(newProps) {
    console.log('componentWillReceiveProps is triggered')
    console.log('new props: ', newProps)
  }
  shouldComponentUpdate(newProps, newState) {
    console.log('shouldComponentUpdate is triggered')
    console.log('new props: ', newProps)
    console.log('new state: ', newState)
    return true
  }
  componentWillUpdate(newProps, newState) {
    console.log('componentWillUpdate is triggered')
    console.log('new props: ', newProps)
    console.log('new state: ', newState)
  }
  componentDidUpdate(oldProps, oldState) {
    console.log('componentDidUpdate is triggered')
    console.log('old props: ', oldProps)
    console.log('old state: ', oldState)
  }
  componentWillUnmount() {
    console.log('componentWillUnmount')
  }
  render() {
    console.log('rendering... Display')
    return (
      <div>{this.props.time}</div>
    )
  }
}

class Users extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
      users: [] // 이렇게 초기화 해놔야 render()에서 해당 상태가 존재하는지 안 하는지 신경 안쓸 수 있음
    }
  }
  componentDidMount() {
    fetch(this.props['data-url'])
      .then((response)=>response.json())
      .then((users)=>this.setState({users: users}))
  }
  render() {
    return <div className="container">
      <h1>List of Users</h1>
      <table className="table-striped table-condensed table table-bordered table-hover">
        <tbody>{this.state.users.map((user)=>
          <tr key={user.id}>
            <td>{user.first_name} {user.last_name}</td>
            <td> {user.email}</td>
            <td> {user.ip_address}</td>
          </tr>)}
        </tbody>
      </table>
    </div>
  }
}

let inputValue ='Texas'
class Autocomplete extends React.Component {
    updateValues(){ //--사용자 입력에 의해 실행됨
        this.props.inputValue = 'California'
        inputValue ='California'
        this.inputValue='California'
        
    }
    render(){
        return(
            <div>
            {this.props.inputValue}
            {inputValue}
            {this.inputValue}
            </div>
        )
    }
}

class Clock extends React.Component{
    render(){
        return <div>{this.state.currentTime}</div>
    }
}

ReactDOM.render(
    <Clock/>
    document.getElementById('content')
)

class MyFancyComponent extends React.Component{
    constructor(props){
        super(props)
        this.state = {...}
    }
    render(){
        ...
    }
}

class Clock extends React.Component{
    constructor(props){
        super(props)
        this.state={currentTime: (new DAte()).toLocaleString('en')}
    }
    ...
}

class Clock extends React.Component{
    counstructor(props){
        super(props)
        this.lauchClock()
        this.state ={
            currentTime: (new DAte()).toLocaleString('en')
        }        
    }
    launchClock(){
        setInterval(()=> {
            console.log('Updating time...')
            this.setState({
            currentTime: (new Date()).toLocaleString('en')
            })
        }, 1000)
    }
    render() {
        console.log('Rendering Clock...')
        return <div>{this.state.currentTime}</div>
    }
}

class HelloWorld extends React.Component{
    render(){
        return <h1{...this.props}> Hello{ this.props.frameworkName} world!!!</h1>
    }
}

functipn Link(props){
    return <a href ={props.href} target="_blank" className="btn btn-primary">
    {props.text}</a>
}

ReactDOM.render(
    <Link text ='Buy React Quickly'
    href ='https://www.manning.com/books/react-quickly' />,
    document.getElementById('content')
)

const Link = (props)=>{
    return (
        <href={props.href}
        target ="_blank"
        className="btn btn-primary" >
            {props.text}
        </a>
    )
}

function Link (props){
    return <a href = {props.href}
    target="_blank"
    className="btn btn-primary">
        {props.text}
    </a>
}

Link.propTypes={...}
Link.defaultProps={...}

...
render() {
    console.log('Rendering...')
    return <div>
    <AnalogDisplay time={this.state.currentTime}/>
    <DigitalDisplay time={this.state.currentTime}/>
    </div>
}

const DigitalDisplay = function(props){
    return <div>{props.time}</div>
}

const AnalogDisplay = function (props) {
  let date = new Date(props.time);
  let dialStyle = {
    position: 'relative',
    top: 0,
    left: 0,
    width: 200,
    height: 200,
    borderRadius: 20000,
    borderStyle: 'solid',
    borderColor: 'black'
  };
  let secondHandStyle = {
    position: 'relative',
    top: 100,
    left: 100,
    border: '1px solid red',
    width: '40%',
    height: 1,
    transform: 'rotate(' + (date.getSeconds() / 60 * 360 - 90).toString() + 'deg)',
    transformOrigin: '0% 0%',
    backgroundColor: 'red'
  };
  let minuteHandStyle = {
    position: 'relative',
    top: 100,
    left: 100,
    border: '1px solid grey',
    width: '40%',
    height: 3,
    transform: 'rotate(' + (date.getMinutes() / 60 * 360 - 90).toString() + 'deg)',
    transformOrigin: '0% 0%',
    backgroundColor: 'grey'
  };
  let hourHandStyle = {
    position: 'relative',
    top: 92,
    left: 106,
    border: '1px solid grey',
    width: '20%',
    height: 7,
    transform: 'rotate(' + (date.getHours() / 12 * 360 - 90).toString() + 'deg)',
    transformOrigin: '0% 0%',
    backgroundColor: 'grey'
  };
  return React.createElement(
    'div',
    null,
    React.createElement(
      'div',
      { style: dialStyle },
      React.createElement('div', { style: secondHandStyle }),
      React.createElement('div', { style: minuteHandStyle }),
      React.createElement('div', { style: hourHandStyle })
    )
  );
};

React.createElement(
    name,
    {key1: value1, key2: vlaue2, ...},
    child1, child2, ..., childN
)

ReactDOM.render(
        React.createElement('h1', null, 'Hello world!'),
        document.getElementById('content')
)

ReactDOM.render(
        <h1>Hello world!</h1>
        document.getElementById('content')
)

class DateTimeNow extends React.Component{
    render(){
        let dateTimeNow = new Date().toLocaleDateString()
        return <span> Hello {this.props.userName}, current date and time is {dateTimeNow}.</span>
    }
}

let helloWorldReactElement = <h1>Hello world!</h1>
class HelloWorld extends React.Component {
  render() {
    return <div>
      {helloWorldReactElement}
      {helloWorldReactElement}
    </div>
  }
}
ReactDOM.render(
  <HelloWorld/>,
  document.getElementById('content')
)

class ProfileLint extends React.Component{
    render(){
        return (
            <a href ={this.props.url}
                title ={this.props.lable}
                target="_blank">
                Profile
            </a>
          
        )
    }
}

<li data-react-is-awesom={this.reactIsAwesome}> React is awesome!</li>

<li data-react-is-awesom="true"}> React is awesome!</li>

<li react-is-awesom={this.reactIsAwesome}> React is awesome!</li>
<li reactIsAwesom={this.reactIsAwesome}> React is awesome!</li>

<li> React is awesome!</li>
<li> React is awesome!</li>

class HelloWorld extends React.Component {
  render() {
    return <h1 {...this.props}>Hello {this.props.frameworkName} world!!!</h1>
  }
}

ReactDOM.render(
  <div>
    <HelloWorld
      id='ember'
      frameworkName='Ember.js'
      title='A framework for creating ambitious web applications.'/>
    <HelloWorld
      id='backbone'
      frameworkName='Backbone.js'
      title='Backbone.js gives structure to web applications...'/>
    <HelloWorld
      id='angular'
      frameworkName='Angular.js'
      title='Superheroic JavaScript MVW Framework'/>
  </div>,
  document.getElementById('content')
)

class Content extends React.Component {
    getUrl(){
        return 'http://webapplog.com'
    }
    
    render(){
        ...
    }
}

class Content extends React.Component {
  getUrl() {
    return 'http://webapplog.com'
  }
  render() {
    return (
      <div>
        <p>Your REST API URL is: <a href={this.getUrl()}>{this.getUrl()}</a></p>
      </div>
    )
  }
}

//방법1 변수
render(){
    let link
    if(this.props.user.session){
        link = <a href="/logout"> Logout</a>
    else
        link =  <a href="/login"> Login</a>
    return <div>{link}</div>
    }
}

// 방법 2 표현식
render(){
    let link = (sessionFlag) => {
       if(sessionFlag){ 
            return <a href="/logout"> Logout</a>
       else 
           return <a href="/login"> Login</a>
    }
    return <div>{link(this.props.user.session})}</div>
}

//방법 3 삼항연산자
render(){
    return(
        <div>
            {(this.props.uwer.session)
            ? <a href="/logout"> Logout</a>
            : <a href="/login"> Login</a>
            }
        </div>
    )   
}

var specialChars = "©—“"
<span>{specialChars}</span>
<input value={specialChars}/>

let h1 = React.createElement('h1', null, 'Hello world!')
class HelloWorld extends React.Component {
  render() {
    return React.createElement('div', null, h1, h1)
  }
}
ReactDOM.render(
  React.createElement(HelloWorld, null),
  document.getElementById('content')
)

ReactDOM.render(
  React.createElement(div, 
                      null, 
                      React.createElement(HelloWorld), 
                      React.createElement(HelloWorld), 
                      React.createElement(HelloWorld)
                      ),
  document.getElementById('content' )
)

React.createElememt('a', {href: 'https://eunii.github.io'})

ReactDOM.render(
  React.createElement(
    'div',
    null,
    React.createElement(HelloWorld, {
      id: 'ember',
      frameworkName: 'Ember.js',
      title: 'A framework for creating ambitious web applications.'}),
    React.createElement(HelloWorld, {
      id: 'backbone',
      frameworkName: 'Backbone.js',
      title: 'Backbone.js gives structure to web applications...'}),
    React.createElement(HelloWorld, {
      id: 'angular',
      frameworkName: 'Angular.js',
      title: 'Superheroic JavaScript MVW Framework'})
  ),
  document.getElementById('content')
)

class HelloWorld extends React.Component {
  render() {
    return React.createElement(
      'h1',
      this.props, //모든 속성을 자식 엘리먼트에 전달한다.
      'Hello ' + this.props.frameworkName + ' world!'
    )
  }
}

var h1 = React.createElement('h1', null, 'Hello world!') //-h1요소를 생성하여 변수에 담음
     ReactDOM.render( //h1요소를 ID가 content인 실제 DOM에 랜더링함
       h1,
       document.getElementById('content')
     )

ReactDOM.render( //h1요소를 ID가 content인 실제 DOM에 랜더링함
  React.createElement('h1', null, 'Hello world!')
  document.getElementById('content')
)

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';   


class Square extends React.Component {
  render() {
    return (
      <button className="square">
        {/* TODO */}
      </button>
    );
  }
}

class Board extends React.Component {
  renderSquare(i) {
    return <Square />;
  }

  render() {
    const status = 'Next player: X';

    return (
      <div>
        <div className="status">{status}</div>
        <div className="board-row">
          {this.renderSquare(0)}
          {this.renderSquare(1)}
          {this.renderSquare(2)}
        </div>
        <div className="board-row">
          {this.renderSquare(3)}
          {this.renderSquare(4)}
          {this.renderSquare(5)}
        </div>
        <div className="board-row">
          {this.renderSquare(6)}
          {this.renderSquare(7)}
          {this.renderSquare(8)}
        </div>
      </div>
    );
  }
}

class Game extends React.Component {
  render() {
    return (
      <div className="game">
        <div className="game-board">
          <Board />
        </div>
        <div className="game-info">
          <div>{/* status */}</div>
          <ol>{/* TODO */}</ol>
        </div>
      </div>
    );
  }
}

// ========================================

ReactDOM.render(
  <Game />,
  document.getElementById('root')
);

class Square extends React.Component {
  render() {
    return (
      <button className="square">
        {this.props.value}
      </button>
    );
  }
}

class Square extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      value: null,
    };
  }
}

class Square extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      value: null,
    };
  }

  render() {
    return (
      <button className="square" onClick={() => this.setState({value: 'X'})}>
        {this.state.value}
      </button>
    );
  }
}

class Board extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      squares: Array(9).fill(null),
    };
  }

  renderSquare(i) {
    return <Square value={i} />;
  }

  render() {
    const status = 'Next player: X';

    return (
      <div>
        <div className="status">{status}</div>
        <div className="board-row">
          {this.renderSquare(0)}
          {this.renderSquare(1)}
          {this.renderSquare(2)}
        </div>
        <div className="board-row">
          {this.renderSquare(3)}
          {this.renderSquare(4)}
          {this.renderSquare(5)}
        </div>
        <div className="board-row">
          {this.renderSquare(6)}
          {this.renderSquare(7)}
          {this.renderSquare(8)}
        </div>
      </div>
    );
  }
}

renderSquare(i) {
    return <Square value ={i} />;

}

renderSquare(i) {
    return <Square value={this.state.squares[i]} />;
  }

renderSquare(i) {
  return (
    <Square
      value={this.state.squares[i]}
      onClick={() => this.handleClick(i)}
    />
  );
}

class Square extends React.Component {
  render() {
    return (
      <button className="square" onClick={() => this.props.onClick()}>
        {this.props.value}
      </button>
    );
  }
}

class Board extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      squares: Array(9).fill(null),
    };
  }

  handleClick(i) {
    const squares = this.state.squares.slice();
    squares[i] = 'X';
    this.setState({squares: squares});
  }

  renderSquare(i) {
    return (
      <Square
        value={this.state.squares[i]}
        onClick={() => this.handleClick(i)}
      />
    );
  }

  render() {
    const status = 'Next player: X';

    return (
      <div>
        <div className="status">{status}</div>
        <div className="board-row">
          {this.renderSquare(0)}
          {this.renderSquare(1)}
          {this.renderSquare(2)}
        </div>
        <div className="board-row">
          {this.renderSquare(3)}
          {this.renderSquare(4)}
          {this.renderSquare(5)}
        </div>
        <div className="board-row">
          {this.renderSquare(6)}
          {this.renderSquare(7)}
          {this.renderSquare(8)}
        </div>
      </div>
    );
  }
}

function Square(props) {
  return (
    <button className="square" onClick={props.onClick}>
      {props.value}
    </button>
  );
}

class Board extends React.Component {
  renderSquare(i) {
    return (
      <Square
        value={this.props.squares[i]}
        onClick={() => this.props.onClick(i)}
      />
    );
  }

  render() {
    return (
      <div>
        <div className="board-row">
          {this.renderSquare(0)}
          {this.renderSquare(1)}
          {this.renderSquare(2)}
        </div>
        <div className="board-row">
          {this.renderSquare(3)}
          {this.renderSquare(4)}
          {this.renderSquare(5)}
        </div>
        <div className="board-row">
          {this.renderSquare(6)}
          {this.renderSquare(7)}
          {this.renderSquare(8)}
        </div>
      </div>
    );
  }
}

class Game extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      history: [
        {
          squares: Array(9).fill(null)
        }
      ],
      stepNumber: 0,
      xIsNext: true
    };
  }

  handleClick(i) {
    const history = this.state.history.slice(0, this.state.stepNumber + 1);
    const current = history[history.length - 1];
    const squares = current.squares.slice();
    if (calculateWinner(squares) || squares[i]) {
      return;
    }
    squares[i] = this.state.xIsNext ? "X" : "O";
    this.setState({
      history: history.concat([
        {
          squares: squares
        }
      ]),
      stepNumber: history.length,
      xIsNext: !this.state.xIsNext
    });
  }

  jumpTo(step) {
    this.setState({
      stepNumber: step,
      xIsNext: (step % 2) === 0
    });
  }

  render() {
    const history = this.state.history;
    const current = history[this.state.stepNumber];
    const winner = calculateWinner(current.squares);

    const moves = history.map((step, move) => {
      const desc = move ?
        'Go to move #' + move :
        'Go to game start';
      return (
        <li key={move}>
          <button onClick={() => this.jumpTo(move)}>{desc}</button>
        </li>
      );
    });

    let status;
    if (winner) {
      status = "Winner: " + winner;
    } else {
      status = "Next player: " + (this.state.xIsNext ? "X" : "O");
    }

    return (
      <div className="game">
        <div className="game-board">
          <Board
            squares={current.squares}
            onClick={i => this.handleClick(i)}
          />
        </div>
        <div className="game-info">
          <div>{status}</div>
          <ol>{moves}</ol>
        </div>
      </div>
    );
  }
}

// ========================================

ReactDOM.render(<Game />, document.getElementById("root"));

function calculateWinner(squares) {
  const lines = [
    [0, 1, 2],
    [3, 4, 5],
    [6, 7, 8],
    [0, 3, 6],
    [1, 4, 7],
    [2, 5, 8],
    [0, 4, 8],
    [2, 4, 6]
  ];
  for (let i = 0; i < lines.length; i++) {
    const [a, b, c] = lines[i];
    if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
      return squares[a];
    }
  }
  return null;
}