React components describe an independent and reusable piece of UI. To define it one can declare a function (functional component) or a class (class
component). When implementing a class component, a render method is required to return the DOM structure, typically with JSX syntax.
When writing the render method in a component it is easy to forget to return the JSX content, which means the component will render nothing. Thus
having a render method without a single return statement is usually a mistake. If it’s required that the component renders
to nothing, the method should return null.
Noncompliant Code Example
const React = require('react');
class App extends React.Component {
render() {
<div>Contents</div>;
}
}
Compliant Solution
const React = require('react');
class App extends React.Component {
render() {
return <div>Contents</div>;
}
}
See
