Traditional React Components as we have seen so far are making a class with class Example extends React.Component or React.createClass(). These make stateful components on the off chance that we at any point set the state (i.e. this.setState(), getInitialState(), or this.state = {} inside a constructor()).
In the event that we have no expectation for a Component to require state, or to require lifecycle methods, we can really compose Components with a pure function, consequently the expression "pure function Component":
1 2 3 4 5 6 7 8 9 10 | function Date(props) { let {msg="The date is:"} = props let now = new Date() return <div> <span> {msg}</span> <time> {now.toLocaleDateString()}</time> </div> } |
This function that returns a React Element can be used wherever we see fit:
1 | DOM.render(<div> <Date msg="Today is"/></div>) |
You might notice that also takes a prop – we can still pass information into the Component.
