React

by Vlad Rasenko

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

function TodoApp() {
	const [someObj, setObj] = React.useState(null)
  React.useEffect(() => {
  	if (!someObj) setObj({items: []})
  	console.log('effect run')
  }, [someObj && someObj.items])
	return <div>test</div>
}

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