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07-property-example.html
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<!doctype html>
<title>07 Property Example - React From Zero</title>
<script src="https://unpkg.com/[email protected]/umd/react.development.js"></script>
<script src="https://unpkg.com/[email protected]/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/[email protected]/prop-types.js"></script>
<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
<div id="app"></div>
<script type="text/babel">
// Here's a more practical example of a component
// it formats a date and returns a <span> containing that formatted string
function DateSpan(props) {
var date = props.date,
day = date.getDate(),
month = date.getMonth() + 1,
year = date.getFullYear()
return <span>{day}.{month}.{year}</span>
}
// Also a more sophisticated type check for the date property
// The property is required, because there are no defaults set
DateSpan.propTypes = {
date: PropTypes.instanceOf(Date).isRequired,
}
// We have to supply a date object and the component does the formatting
var reactElement = <DateSpan date={new Date()}/>
var renderTarget = document.getElementById("app")
ReactDOM.render(reactElement, renderTarget)
</script>