reactjs update state example

1// Correct
2this.setState(function(state, props) {
3  return {
4    counter: state.counter + props.increment
5  };
6});

1You have to use setState() for updating state in React
2{
3  hasBeenClicked: false,
4  currentTheme: 'blue',
5}
6
7setState({
8	hasBeenClicked: true
9});
10

1function tick() {
2  const element = (
3    <div>
4      <h1>Hello, world!</h1>
5      <h2>It is {new Date().toLocaleTimeString()}.</h2>
6    </div>
7  );
8  ReactDOM.render(    element,    document.getElementById('root')  );}
9
10setInterval(tick, 1000);

1You have to use setState() for updating state in React
2{
3  hasBeenClicked: false,
4  currentTheme: 'blue',
5}
6
7setState({
8	hasBeenClicked: true
9});