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Express res.clearCookie() Method

Updated on Nov 24, 2024
By Mari Selvan
👁️ 114 - Views
⏳ 4 mins
💬 1 Comment
Express res.clearCookie() Method

Photo Credit to CodeToFun

🙋 Introduction

Cookies play a crucial role in web development, enabling the storage of user-specific information on the client side. In Express.js, the res.clearCookie() method provides a way to efficiently manage cookies.

This guide explores the syntax, use cases, and best practices for utilizing res.clearCookie() in your Express.js applications.

💡 Syntax

The syntax for the res.clearCookie() method is straightforward:

syntax.js
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res.clearCookie(name, [options])
  • name: The name of the cookie to be cleared.
  • options: An optional object containing additional parameters like the cookie's domain, path, etc.

❓ How res.clearCookie() Works

The res.clearCookie() method is particularly useful when you need to remove a cookie previously set in the client's browser.

example.js
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app.get('/logout', (req, res) => {
  // Clear the 'userToken' cookie upon logout
  res.clearCookie('userToken');
  res.send('Logged out successfully');
});

In this example, the /logout route uses res.clearCookie() to delete the 'userToken' cookie when a user logs out.

📚 Use Cases

  1. User Logout:

    Use res.clearCookie() in scenarios where you want to clear multiple cookies, providing a clean logout experience for users.

    example.js
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    app.get('/logout', (req, res) => {
      // Clear multiple cookies upon logout
      res.clearCookie('userToken');
      res.clearCookie('userData');
      res.send('Logged out successfully');
    });
  2. Session Expiry:

    Leverage res.clearCookie() to handle session expirations by removing the session cookie.

    example.js
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    app.get('/expire-session', (req, res) => {
      // Clear the session cookie upon session expiration
      res.clearCookie('sessionID');
      res.send('Session expired');
    });

🏆 Best Practices

  1. Specify Cookie Options:

    When using res.clearCookie(), consider specifying the same options used when setting the cookie to ensure proper removal.

    example.js
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    app.get('/logout', (req, res) => {
      // Clear the 'userToken' cookie with specified options
      res.clearCookie('userToken', { path: '/', domain: '.example.com' });
      res.send('Logged out successfully');
    });
  2. Use Secure and HttpOnly Flags:

    For sensitive cookies, set the secure and httpOnly flags when clearing cookies to enhance security.

    example.js
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    app.get('/logout', (req, res) => {
      // Clear the 'userToken' cookie with secure and httpOnly flags
      res.clearCookie('userToken', { secure: true, httpOnly: true });
      res.send('Logged out successfully');
    });

🎉 Conclusion

The res.clearCookie() method in Express.js is a powerful tool for managing cookies. Whether you're handling user logouts or expiring sessions, understanding how to use res.clearCookie() ensures a seamless and secure cookie management experience.

Now equipped with knowledge about the res.clearCookie() method, you can enhance your Express.js applications by efficiently managing cookies.

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Author

author
👋 Hey, I'm Mari Selvan

For over eight years, I worked as a full-stack web developer. Now, I have chosen my profession as a full-time blogger at codetofun.com.

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Mari Selvan
Mari Selvan
9 months ago

If you have any doubts regarding this article (Express res.clearCookie() Method), please comment here. I will help you immediately.

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