How To Do Conditional Rendering In React? See Example

Conditional rendering in React allows you to render different UI elements based on certain conditions, like state or props values.

---

Using if Statement

function Greeting(props) {
  const isLoggedIn = props.isLoggedIn;
  if (isLoggedIn) {
    return <h1>Welcome Back!</h1>;
  } else {
    return <h1>Please Sign In</h1>;
  }
}

---

Using Ternary Operator

function Greeting({ isLoggedIn }) {
  return (
    <h1>
      {isLoggedIn ? "Welcome Back!" : "Please Sign In"}
    </h1>
  );
}

---

Using Logical && Operator

function Notification({ messages }) {
  return (
    <div>
      {messages.length > 0 && <h2>You have {messages.length} messages</h2>}
    </div>
  );
}

---

Best Practices

• Keep conditional logic simple and readable
• Avoid deeply nested conditions
• Prefer ternary operators or logical && for inline rendering
• Lift complex logic to helper functions if needed

---

Conclusion

Conditional rendering makes React components dynamic and responsive, showing content based on user actions, props, or state changes.

---

Citations

https://savanka.com/category/learn/react/
https://www.w3schools.com/REACT/DEFAULT.ASP