ReactJS uses JSX and that works different with CSS. Normally you can use a style
string.
But with JSX you use a two curly-bracketed javascript property list then the css name and value are the properties. Dashes are replaced by camal case:
<html>
<head>
<script src="https://unpkg.com/react@16.3.1/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.3.1/umd/react-dom.development.js"></script>
<script src="https://unpkg.com/babel-standalone@6.26.0/babel.js"></script>
<script src="https://unpkg.com/prop-types@15.6.1/prop-types.js"></script>
</head>
<body>
<div id="root"></div>
</body>
<script type="text/babel">
class Hello extends React.Component {
render() {
return (
<div style={{display: "flex", flexDirection: "row"}}>
<div>Hello {this.props.name}!</div>
<button>on acid</button>
</div>
);
}
}
ReactDOM.render(
<Hello name="Davey dave dave" />,
document.getElementById('root')
);
</script>