What you need to know about React 16

Alex Bachuk
Sep 29, 2017 · 3 min read
Image for post
Image for post

Fiber

Server Side Rendering

hydrate(<App/>, document.getElementById("root"));

Error Handling

Render elements outside components

render() {
return ReactDOM.createPortal(
<div className="modal">
{this.props.children}
</div>,
document.createElement('div')
);
}

Support for custom HTML attributes

<div unicornindex="1">🦄</div>

Render arrays and strings

const ListItems = () => ([
<li>One</li>
<li>Two</li>
<li>Three</li>
]);
const Text = () => ('This is just plain text')

State performance improvement

getUserName = (user) => {
const newName = user.name;
this.setState(state => {
if (state.username === newName) {
return null;
} else {
return { username: newName};
}
});
};

Breaking change

MIT licensed


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Full stack JavaScript development shop

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