Mastering TypeScript for React

Why TypeScript?

TypeScript adds static type checking to JavaScript, helping you catch errors before runtime. For React developers, this means more confident refactoring, better IDE support, and clearer component APIs.

Essential Types for React

#

Component Props

interface ButtonProps {
  variant?: 'primary' | 'secondary';
  size?: 'sm' | 'md' | 'lg';
  onClick?: () => void;
  children: React.ReactNode;
}
const Button: React.FC = ({
  variant = 'primary',
  size = 'md',
  onClick,
  children
}) => {
  // Component implementation
};

#

Event Handlers

const handleClick = (e: React.MouseEvent) => {
  e.preventDefault();
  // Handle click
};
const handleChange = (e: React.ChangeEvent) => {
  setValue(e.target.value);
};

Advanced Patterns

#

Generic Components

interface ListProps {
  items: T[];
  renderItem: (item: T) => React.ReactNode;
}
function List({ items, renderItem }: ListProps) {
  return (
    

      {items.map((item, index) => (
        
{renderItem(item)}
      ))}
    
  );
}

Conclusion

Mastering TypeScript takes time, but the benefits for React development are immense. Start with the basics and gradually incorporate more advanced patterns as you become comfortable.