How to use styles in React?

The style attribute accepts a JavaScript object with camelCased properties rather than a CSS string. This is consistent with the DOM style JavaScript property, is more efficient, and prevents XSS security holes.

const divStyle = {
color: "blue",
backgroundImage: "url(" + imgUrl + ")",
};

function HelloWorldComponent() {
return <div style={divStyle}>Hello World!</div>;
}

Style keys are camelCased in order to be consistent with accessing the properties on DOM nodes in JavaScript (e.g. node.style.backgroundImage).