no-class-component

Rule category

Restriction.

What it does

Prevents the use of class components.

Why is this bad?

Component is the base class for the React components defined as JavaScript classes. Class components are still supported by React, but we don’t recommend using them in new code.

It is recommended to define components as functions instead of classes. See how to migrate.

Examples

This rule aims to prevent usage of class components in React.

Failing

import React from "react";
 
interface ExampleProps {
  name: string;
}
// @warn: Do not use class components
 
class Example extends React.Component<ExampleProps> {
  render() {
    return <h1>Hello, {this.props.name}!</h1>;
  }
}

Passing

import React from "react";
 
interface ExampleProps {
  name: string;
}
// @annotate: Use function components instead
 
function Example({ name }: ExampleProps) {
  return <h1>Hello, {name}!</h1>;
}